diff --git a/core/postfix/Dockerfile b/core/postfix/Dockerfile
index 8652eaa0..af29bf91 100644
--- a/core/postfix/Dockerfile
+++ b/core/postfix/Dockerfile
@@ -12,7 +12,7 @@ RUN pip3 install socrate==0.2.0
 RUN pip3 install "podop>0.2.5"
 
 # Image specific layers under this line
-RUN apk add --no-cache postfix postfix-pcre cyrus-sasl-plain
+RUN apk add --no-cache postfix postfix-pcre cyrus-sasl-plain cyrus-sasl-login
 
 COPY conf /conf
 COPY start.py /start.py
diff --git a/towncrier/newsfragments/1632.feature b/towncrier/newsfragments/1632.feature
new file mode 100644
index 00000000..06d78d6c
--- /dev/null
+++ b/towncrier/newsfragments/1632.feature
@@ -0,0 +1 @@
+Add support for AUTH LOGIN authentication mechanism for relaying email via smart hosts.