Commit Graph

1300 Commits (4da0ff1856ff8a39b308305ad9257710a39ffb46)

Author SHA1 Message Date
Florent Daigniere 6425f440d3 fix 2147
Florent Daigniere 379fe18f7a test dns resolvers at startup
Florent Daigniere 98973223fd
reduce TTL to 1d
Florent Daigniere 792893caae change TTL to 1y
Florent Daigniere 671f3e382a Fix 2138: Pin DANE with the full cert
Florent Daigniere 7f89a29790 Fix 2125
Make the caller responsible to know whether the rate-limit code should
be called or not
bors[bot] 65d905fe62
Merge
2099: update Dockerfile to alpine 3.14.3 r=mergify[bot] a=willofr

## What type of PR?
Security fix

## What does this PR do?
Updated the Dockerfile to use the latest alpine version 3.14.3 where several CVEs have been fixed: https://alpinelinux.org/posts/Alpine-3.14.3-released.html
New images successfully built on my test env.

### Related issue(s)
None

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Will <will@packer-output-c8fcfb40-3d93-4475-8f87-e14a9dd683b6>
Co-authored-by: willofr <willofr@users.noreply.github.com>
bors[bot] 3eca813182
Merge
2116: fix 2114: redirect old path r=mergify[bot] a=nextgens

## What type of PR?

bug-fix

## What does this PR do?

Old paths may still be cached in browsers, it's easy enough to redirect them

### Related issue(s)
- close 


Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
Florent Daigniere c4675e6e75 fix 2114: redirect old path
Dimitri Huisman b4d3d4b3c9 Preparations for 1.9 release.
Erriez 4b0694705c Fix build dependencies pycares
Dimitri Huisman 51d94b8d14 Fix issue 2102
Will b2abbc8856 update Dockerfile to alpine 3.14.3
Florent Daigniere bee6e980e3 doh
Florent Daigniere 58d0faff7f ensure we clear the token on delete()
Florent Daigniere 2b29cfb3f0 fix cleanup_sessions()
Florent Daigniere f0247a2faf Use self where appropriate
Florent Daigniere c161a2c987 syntax
bors[bot] 18865bf03b
Merge
2094: Sessions tweaks r=mergify[bot] a=nextgens

## What type of PR?

bug-fix

## What does this PR do?

- Make all sessions permanent, introduce SESSION_TIMEOUT and PERMANENT_SESSION_LIFETIME.
- Prevent the creation of a session before there is a login attempt
- Ensure that webmail tokens are in sync with sessions

### Related issue(s)
- close  

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
Co-authored-by: Dimitri Huisman <diman@huisman.xyz>
Dimitri Huisman d40be05117 Fix missing edit buttons in alias, relay and fetchmail lists in admin.
Florent Daigniere a28c7f903e do it once
Dimitri Huisman f88daa1e77 Add missing cast to int
Florent Daigniere 5f313310d4 regenerate() shouldn't extend lifetime
Florent Daigniere fe18cf9743 Fix 2080
Ensure that webmail tokens are in sync with sessions
Florent Daigniere 02c93c44f2 Tweak sessions
simplify:
- make all sessions permanent by default
- update the TTL of sessions on access (save always)
- fix session-expiry, modulo 8byte precision
Florent Daigniere ea96a68eb4 don't create a session if we don't have to
bors[bot] 7c03878347
Merge
1441: Rsyslog logging for postfix r=mergify[bot] a=micw


## What type of PR?

enhancement

## What does this PR do?
Changes postfix logging from stdout to rsyslog:
* stdout logging still enabled
* internal test request log messages are filtered out by rsyslog
* optional logging to file via POSTFIX_LOG_FILE env variable

## Prerequistes
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/guide.html#changelog) entry file.


2090: fix 2086 r=mergify[bot] a=nextgens

## What type of PR?

bug-fix

## What does this PR do?

Fix a bug I've introduced in ae8db08bd

### Related issue(s)
- close 

Co-authored-by: Michael Wyraz <michael@wyraz.de>
Co-authored-by: Dimitri Huisman <diman@huisman.xyz>
Co-authored-by: Dimitri Huisman <52963853+Diman0@users.noreply.github.com>
Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
Florent Daigniere 346ace5fb3 Make webmail the default action
bors[bot] 634318adba
Merge
2072: use dovecot-fts-xapian from alpine package r=mergify[bot] a=willofr

## What type of PR?

enhancement

## What does this PR do?
use dovecot-fts-xapian from alpine packages repository (newer) instead of compiling an older version from source
see https://pkgs.alpinelinux.org/package/edge/community/x86/dovecot-fts-xapian

### Related issue(s)
No

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: willofr <willofr@users.noreply.github.com>
Florent Daigniere 09926702d6 fix 2086
bors[bot] e7f77875e2
Merge
2084: Fix  (login to webmail did not work when WEB_WEBMAIL=/ was set) r=mergify[bot] a=Diman0

## What type of PR?

bug-fix

## What does this PR do?
It fixes . Login from SSO page to webmail did not work if WEB_WEBMAIL=/ was set in mailu.env.

I tested that it works with
- WEB_WEBMAIL=/webmail
- WEB_WEBMAIL=/

### Related issue(s)
- closes  

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] n/a In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Dimitri Huisman <diman@huisman.xyz>
Co-authored-by: Florent Daigniere <nextgens@users.noreply.github.com>
Florent Daigniere d7a8235b89
Simplify
bors[bot] 08be233607
Merge
2058: Implement versioning for CI/CD workflow. r=mergify[bot] a=Diman0

## What type of PR?

Feature!

## What does this PR do?
This PR introduces 3 things
- Add versioning (tagging) for branch x.y (1.8). E.g. 1.8.0, 1.8.1 etc.
  - docker repo will contain x.y (latest) and x.y.z (pinned version) images.
  - The X.Y.Z tag is incremented automatically. E.g. if 1.8.0 already exists, then the next merge on 1.8 will result in the new tag 1.8.1 being used.
- Make the version available in the image.
  -  For X.Y and X.Y.Z write the version (X.Y.Z) into /version on the image and add a label with version=X.Y.Z
	  -  This means that the latest X.Y image shows the pinned version (X.Y.Z e.g. 1.8.1) it was based on. Via the tag X.Y.Z you can see the commit hash that triggered the built.
  -  For master write the commit hash into /version on the image and add a label with version={commit hash}
-  Automatic releases. For x.y triggered builts (e.g. merge on 1.9) do a new github release for the pinned x.y.z (e.g. 1.9.2). 
  -  Release shows a static message (see RELEASE_TEMPLATE.md) that explains how to reach the newsfragments folder and change the branch to the tag (x.y.z) mentioned in the release. Now you can get the changelog by reading all newsfragment files in this folder.

This PR does not change anything to our workflow (what we (human persons) do). Our processes are still exactly the same. The above introduced logic is automatic. When we backport to X.Y all the magic for creating the pinned version X.Y.Z is handled by the CI/CD workflow.

### Related issue(s)
- closes 

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.

## Testing
Suggested testing steps. This should cover all situations including BORS. It does require that you use your own docker repo or temporarily create a new one.
Suggested testing steps.
1. Create new github repo.
2. Add the required docker secrets to the project (see beginning of CI.yml for the secret names), DOCKER_UN, DOCKER_PW, DOCKER_ORG, DOCKER_ORG_TESTS.
3. Clone the project.
4. Copy the contents of the PR to the cloned project.
5. Push to your new github repo.
6. Now master images are built. Check that images with tag master are pushed to your docker repo
7. Check with docker inspect nginx:master that it has the label version={commit hash}.
8. Run an image, run `docker-compose exec <name> cat /version`. Note that /version also contains the pinned version. For master the pinned version is the commit hash.
9. Create branch 1.8. 
10. Push branch 1.8 to repo.
11. Note that tags 1.8 and 1.8.0 are built and pushed to docker repo
12. Inspect label and /version. Note that 1.8 and 1.8.0 both show version 1.8.0.
13. Push another commit to branch 1.8.
14. Note that tags 1.8 and 1.8.1 are built and pushed to docker repo
15. Inspect label and /version. Note that 1.8 and 1.8.1 both show version 1.8.1.
16. Let's check BORS stuff.
17. Create branch testing.
18. Push the commit with the exact commit text (IMPORTANT!!): `Try #1234:`'.
19. Note that images are built and pushed for tag `pr-1234`.
20. Inspect label and /version. Note that the version is `pr-1234`.
20. Create branch staging.
21. Push the commit with commit text: `Merge #1234`.
22. Note that this image is not pushed to docker (as expected).

but you could also check the GH repo and docker repo I used:
https://github.com/Diman0/Mailu_Fork
https://hub.docker.com/r/diman/rainloop/tags

Co-authored-by: Dimitri Huisman <diman@huisman.xyz>
bors[bot] d2a2a3a8bf
Merge
2076: fix the default for DEFER_ON_TLS_ERROR r=mergify[bot] a=nextgens

## What type of PR?

bug-fix

## What does this PR do?

The default wasn't set anywhere

Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
Dimitri Huisman fdb10cfb85 Start crond when POSTFIX_LOG_FILE is set
Dimitri Huisman 5bedcc1cb1 Fix
Dimitri Huisman d76773b1df Also check the SMTP port for webmail/token
Dimitri Huisman f26fa8da84 Fix Webmail token check. Fix Auth-Port for Webmail.
Florent Daigniere 593e3ac5a4 fix DEFER_ON_TLS_ERROR
willofr 841b29e794
revert back to alpine 3.14.2 as requested
willofr 73f5291cdb
Merge branch 'Mailu:master' into patch-1
Dimitri Huisman 53975684b8 Using Syslog is the new standard. It is not optional anymore.
willofr 84af3a3e50
use dovecot-fts-xapian from alpine package
I suggest using the dovecot-fts-xapian package from the alpine repository (newer) instead of compiling an older version from source:
see https://pkgs.alpinelinux.org/package/edge/community/x86/dovecot-fts-xapian
Florent Daigniere 4fffdd95e9 Reduce logging level
Dimitri Huisman d5896fb2c6 Add log rotation (if logging to file). Make rsyslog the default.
Florent Daigniere 89a7a8ac13 Fix score of RCVD_NO_TLS_LAST
Florent Daigniere 1925b2e0fb Upgrade rspamd
Dimitri Huisman 567b5ef172
Merge branch 'master' into postfix-logging
Dimitri Huisman 0de2ec77c6 Process code review remarks
Dimitri Huisman f7677543c6 Process code review remarks
- Moved run to bottom of Dockerfile to allow using unmodified / cached states.
- Simplified bash code in deploy.sh.
- Improved the large bash one-liner in CI.yml. It could not handle >9 for 1.x.
Dimitri Huisman 56dd70cf4a Implement versioning for CI/CD workflow (see ).
Alexander Graf aa1d605665
Merge remote-tracking branch 'upstream/master' into passlib
Alexander Graf 84a5514a97
fixed auto reply form
Alexander Graf cf7914d050
fixed field iteration
Alexander Graf fd5bdc8650
added localized date output
Alexander Graf 0315ed78d9
Merge remote-tracking branch 'upstream/master' into update_deps
Till Skrodzki c48e00ee26 Do not call .split() on RELAYNETS if not specified
bors[bot] 56cbc56df7
Merge
2044: Vault/rspamd: don't return any key for relayed domains r=mergify[bot] a=nextgens

## What type of PR?

enhancement

## What does this PR 

Don't return any key for relayed domains. We may want to revisit this (ARC signing)... but in the meantime it saves from a scary message in rspamd.
    
```signing failure: cannot request data from the vault url: /internal/rspamd/vault/v1/dkim/ ...```


Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
bors[bot] 78dd13a217
Merge
2042: Add MESSAGE_RATELIMIT_EXEMPTION r=mergify[bot] a=nextgens

## What type of PR?

Enhancement

## What does this PR do?

Add a new knob called ```MESSAGE_RATELIMIT_EXEMPTION```.

### Related issue(s)
- 

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] In case of feature or enhancement: documentation updated accordingly
- [ ] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
Florent Daigniere 6bf1a178b9 Go with ghostwheel42's suggestion
Florent Daigniere b68033eb43 only parse it once
Alexander Graf 82e14f1292
Merge branch 'master' into update_deps
bors[bot] f0188d9623
Merge
2034: Add timezone to containers r=mergify[bot] a=DjVinnii

## What type of PR?

Enhancement

## What does this PR do?
This PR adds the tzdata package so that the environment variable `TZ` can be used to set the timezone of containers.

### Related issue(s)
- closes  

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: DjVinnii <vincentkling@msn.com>
Florent Daigniere dc6e970a7f handle HTTP too
Florent Daigniere bbef4bee27 Don't return any key for relayed domains
We may want to revisit this (ARC signing)... but in the meantime
it saves from a scary message in rspamd

signing failure: cannot request data from the vault url: /internal/rspamd/vault/v1/dkim/ ...
Florent Daigniere 6c6b0b161c Set the right flags on the rate_limit cookie
Florent Daigniere f9373eacab Merge remote-tracking branch 'upstream/master' into misc
Florent Daigniere 5714b4f4b0 introduce MESSAGE_RATELIMIT_EXEMPTION
DjVinnii 30d7e72765 Move TZ to Advanced settings
DjVinnii 225160610b Set default TZ in Dockerfiles
DjVinnii 81e33d3679 Add default TZ to config manager
Alexander Graf 97e79a973f fix sso login button spacing again
Alexander Graf 73ab4327c2 updated database libraries (sqlalchemy etc.)
this is working fine, but introduces a sqlalchemy warning
when using config-import:

  /app/mailu/schemas.py:822:
    SAWarning: Identity map already had an identity for (...),
    replacing it with newly flushed object.
    Are there load operations occurring inside of an event handler
    within the flush?
Alexander Graf 4669374b9e use python wheels
Alexander Graf 85d86d4156 some more libs updated
Alexander Graf ffd99c3fa8 updated flask
ConfigManager should not replace app.config - this is causing trouble
with some other flask modules (swagger).
Updated ConfigManager to only modify app.config and not replace it.
Alexander Graf 87884213c4 update misc helper libs
Alexander Graf 56f65d724d update babel
Alexander Graf 5238b00f0b update alembic
Alexander Graf f613205fe1 update tenacity
Alexander Graf 833ccb5544 reload page using GET when selecting language
Alexander Graf 8b15820b01 fix sso login button spacing
Alexander Graf 26fb108a3f updated Flask-Login
Alexander Graf abc4112242 updated Werkzeug, Click and Flask-Migrate
Alexander Graf f1d7bedd1b fix display of range inputs (again)
Alexander Graf 13e6793c9f Merge remote-tracking branch 'upstream/master' into update_deps
Alexander Graf aca1e13648 update socrate - will be removed later
Alexander Graf 866741bcbe updated WTForms-Components deps
Alexander Graf ef19869cde updated redis
Alexander Graf d8efd3057c updated idna
Alexander Graf 8ad8cde0e2 removed some obsolete requirements
Alexander Graf 3ac1b3d86c update pyyaml and pygments
Alexander Graf 40cdff4911 updated dnspython
Alexander Graf dcbe55f062 updated crypto
Alexander Graf 771b2d1112 duh
Alexander Graf 23d0cd0466 update tabluate. fix audit.py and include in container
Alexander Graf 8d90a74624 update werkzeug to 1.x
bors[bot] 5e212ea46d
Merge
2036: round display of range inputs to 2 decimals r=mergify[bot] a=ghostwheel42

## What type of PR?

small fix

## What does this PR do?

rounds display of range inputs to 2 decimals 

### Related issue(s)

- small fix to 

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [X] In case of feature or enhancement: documentation updated accordingly
- [X] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Alexander Graf <ghostwheel42@users.noreply.github.com>
Alexander Graf 80be3506da upgrade pip. completed reqs via pip freeze
Alexander Graf 598b2df5a0 update wtforms
Alexander Graf e8b5f1a185 round display of range inputs to 2 decimals
DjVinnii 1d6809193b Add tzdata to core
Florent Daigniere 74b31dc407 Ensure that RCVD_NO_TLS_LAST doesn't add spam points
bors[bot] 11bbceb9cc
Merge
2032: doh r=mergify[bot] a=nextgens

This should have been part of 

Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
Florent Daigniere 8dad40f67c doh
bors[bot] e52a3de1b0
Merge
2027: Make logs more quiet r=mergify[bot] a=nextgens

## What type of PR?

enhancement

## What does this PR do?

It silences various useless log messages in front, specifically:
```
Oct 30 03:11:04 instance-20210109-1612 docker-front[1963]: 127.0.0.1 - - [30/Oct/2021:03:11:04 +0000] "GET /health HTTP/1.1" 301 162 "-" "curl/7.78.0"
Oct 30 03:11:04 instance-20210109-1612 docker-front[1963]: 127.0.0.1 - - [30/Oct/2021:03:11:04 +0000] "GET /health HTTP/2.0" 204 0 "-" "curl/7.78.0"
Oct 30 03:11:04 instance-20210109-1612 docker-front[1963]: 2021/10/30 03:11:04 [info] 476302#476302: *2622679 client 127.0.0.1 closed keepalive connection
Oct 30 03:13:02 instance-20210109-1612 docker-front[1963]: 127.0.0.1 - - [30/Oct/2021:03:13:02 +0000] "GET /auth/email HTTP/1.0" 200 0 "-" "-"
```

`@micw` has requested it for k8s

2030: Fix RELAYNETS r=mergify[bot] a=nextgens

## What type of PR?

bug-fix

## What does this PR do?

RELAYNETS should be comma separated like everything else; rspamd should also be aware of what is considered "trusted".

I am not sure whether ```local_networks``` is the right configuration option for it though

- close 

Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
Florent Daigniere 2170e07731 Tell rspamd about RELAYNETS
Florent Daigniere 9d474f32a6 RELAYNETS is comma separated!
Florent Daigniere f3c93212c6 The Rate-limiter should run after the deny
Florent Daigniere 53a0363b9e Deal with the noisy keepalive messages
We don't particularly care about HTTP... and that's what's noisy.
Florent Daigniere 80a85c27a9 Silent healthchecks in logs
Alexander Graf 9bc685c30b removed some more whitespace
Alexander Graf 8c31699baf fixed locale selector for no_NB
Alexander Graf 882a27f87c simplified if's and added external link icon
Alexander Graf 3141ffe791 removed some whitespace
Dimitri Huisman 6b16756d92 Fix acessing antispam via sidebar.
Dimitri Huisman 3449b67c86 Process code review remarks PR2023
Dimitri Huisman 8784971b7f Merge rate limiting and failed login logging
Dimitri Huisman 503044ef6e Reintroduce ProxyFix. Use two buttons for logging in.
Dimitri Huisman c42ad8e71e Forgot to include changes for url_for of base.html
Dimitri Huisman fb0f005343 Get rid of complicated prefix logic. Further simplify /static handling and nginx config.
Dimitri Huisman da788ddee3 Merge branch 'fix-sso-1929' of github.com:Diman0/Mailu into fix-sso-1929
Dimitri Huisman bdcc183165 Redirect to configured ENV VAR for Admin/Webmail, further simplify nginx config.
Dimitri Huisman f1a60aa6ea Remove unneeded auth_request_set
Florent Daigniere fee13e6c4b Save a redirect
Florent Daigniere d3f07a0882 Simplify the handling of /static
Florent Daigniere aee089f3b1 Ensure that static assets are readable
Dimitri Huisman a47afec4ee Make logic more readable.
Dimitri Huisman 48764f0400 Ensure all requests from the page sso go through the page sso.
Dimitri Huisman 5232bd38fd Simplify webmail logout.
Dimitri Huisman aab258d284 Move handling of logging out in admin, to sso logout page.
Dimitri Huisman 615743b331 Improve indendation of conditions.
Dimitri Huisman 5d81846c5d Introduce the shared stub /static for providing all static files
Dimitri Huisman eb74a72a52 Moved locations to correct area in nginx.conf.
Dimitri Huisman aa7380ffba Doh!
Dimitri Huisman 44d2448412 Updated SSO logic for webmails. Fixed small bug rate limiting.
Dimitri Huisman f9eee0cbaf Adapt HEALTHCHECK to new URL
Dimitri Huisman ed7adf52a6 Merge branch 'master' of github.com:Diman0/Mailu into fix-sso-1929
Dimitri Huisman 913a6304a7 Finishing touches. Introduce /static stub for handling all static files.
bors[bot] a1192d8039
Merge
1987: Enhancement to the rate limits r=mergify[bot] a=nextgens

## What type of PR?

enhancement

## What does this PR do?

Turn the rate-limiters into something useful (that won't fire for no reason).

- fix rate-limiting on /webdav/
- it changes the rate-limiting behaviour from limiting a single IP address to a subnet of a reasonable size (/24 on v4 and /56 on v6 both are now configurable) : AUTH_RATELIMIT_IP / AUTH_RATELIMIT_IP_V4_MASK / AUTH_RATELIMIT_IP_V6_MASK
- It ensures we only use IP-based rate-limits for attempts on accounts that do not exist
- it creates a new rate limit preventing attackers from targetting a specific user account (separate from what's above) : AUTH_RATELIMIT_USER
- it introduces a rate limiting exemption mechanism whereby, upon authentication, users will see their source-ip address being exempt for a specific amount of time AUTH_RATELIMIT_EXEMPTION_LENGTH. A similar mechanism is available for web-based sessions (see below)
- It introduces in AUTH_RATELIMIT_EXEMPTION a comma separated list of network CIDRs that will be exempt from both types of rate limiting
- it implements device-tokens, as described on https://owasp.org/www-community/Slow_Down_Online_Guessing_Attacks_with_Device_Cookies to ensure that genuine users aren't locked-out by a malicious attacker abusing the rate-limit feature.

Things that could be improved include:
- the IP-based rate limiter flags attempts against "non-existing" accounts: it could go further and flag the number of unique non-existing accounts attempted (to prevent the case of a user making a typo in his MUA configuration)
- the IP address exemption mechanism doesn't pin the exemption to a specific username: any real user can trivially bypass the rate limits (and attempt to brute-force someone else's account)

### Related issue(s)
- close 
- close  
- close 


## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
Co-authored-by: Diman0 <diman@huisman.xyz>
Co-authored-by: Florent Daigniere <nextgens@users.noreply.github.com>
Florent Daigniere 693b578bbb The second strip isn't necessary
Florent Daigniere 1c6165213c better that way
Florent Daigniere 34497cff20 doh
Florent Daigniere e8871dd77f doh
Florent Daigniere 5b72c32251 Doh
Florent Daigniere 19b784b198 Parse the network configuration only once
thanks @ghostwheel42
Florent Daigniere 98742268e6 Make it more readable
Florent Daigniere 94bbed9746 Ensure we have the right IP
Florent Daigniere c5bd82650f doh
Florent Daigniere 99c81c20a7 Introduce AUTH_RATELIMIT_EXEMPTION
This disables rate limiting on specific CIDRs