Build 2.9.0.beta4 (82ac698d4f)
In the Admin → Settings → Email page
Discourse ignores the Reply by email address if the email address does not contain %{reply_key} and instead will use the default email address in the to and reply-to headers of the emails it sends out.
Here are the steps to replicate the issue and also what works:
BROKEN
Assuming the default email address set in discourse is forum@domain.com
-
reply by email enabled→ checked -
reply by email address→ community.forum@domain.com
When discourse sends emails, the from and the reply-to headers contain forum@domain.com instead of community.forum@domain.com
WORKING
However, if I add %{reply_key} to the reply by email address:
-
reply by email address→ community.forum+%{reply_key}@domain.com
This works as expected and the email now comes from community.forum+<id>@domain.com with the reply-to header also set correclty.