mailu/towncrier/newsfragments
bors[bot] c15e4e6015
Merge
2276: Autoconfig of email clients r=mergify[bot] a=nextgens

## What type of PR?

Feature

## What does this PR do?

It provides auto-configuration templates for email clients and encourages them to use implicit TLS (see https://nostarttls.secvuln.info/)

There are numerous caveats:
- it will only work if suitable DNS records are created and certificates obtained (autoconfig, autodiscover, ...)
- the mobileconfig file isn't signed
- the credentials will be prompted... we could/should provision a token on each request instead
- it currently doesn't advertise caldav
- it's IMAP only

### 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>
..
224.feature Ask users to check their DNS records
2099.bugfix Create 2099.bugfix
2117.bugfix Fix . Gpg-agent package was missing for roundcube image.
2121.misc Add newsfragment for PR .
2124.bugfix Tag for release is correctly tagged to branch x.y.
2125.bugfix towncrier
2135.bugfix towncrier
2138.bugfix Fix 2138: Pin DANE with the full cert
2141.bugfix Create 2141.bugfix
2185.doc Create 2185.doc
2193.bugfix Create 2193.bugfix
2195.bugfix Create 2195.bugfix
2196.bugfix Create 2196.bugfix
2199.bugfix Update 2199.bugfix
2207.bugfix Add bugfix description
2210.bugfix Create 2210.bugfix
2211.misc Ensure we use IMAP IDLE like it's supposed to work
2213.feature typo
2214.doc Update fail2ban faq doc
2239.bugfix towncrier
2249.bugfix Fix broken setup. Not all dependencies were pinned. As usual a dependency had a breaking update.
2260.bugfix towncrier
2281.bugfix Create 2281.bugfix
2284.bugfix Create 2284.bugfix