On 2025-04-12 Sander ter Steege via Exim-users <exim-users@lists.exim.org> wrote: > Hi All,
> This is my first post to this list, so if I missed finding this info in a FAQ > somewhere, please forgive me. > I’m configuring a new exim server (4.98 on Almalinux 9) to replace a > really old one (4.63 on CentOS 5) and I’m running into problems when > sending mail for authenticated users. > I’ve checked if exim knows its local domains using exim -bt and it > does recognise the local user without any problem. > However when I try to send an email using a MTA exim adds the value of > the primary_hostname after the authenticated username even if it > contains a valid local email address and I’m completely puzzled why it > would do this. > So when I try to send an email from u...@example.com it works without > a problem, but as soon as I try the same using Thunderbird as an MTA > it changes the from to “u...@examle.com”@primary_hostname.com [...] The log in 94dbb769-9cdd-4469-bd8a-d4ed9f218...@sins-it.nl shows that the From: header is unchanged and a sender header "u...@examle.com"@primary_hostname.com is added. So I think you are not talking about the From: header but about the envelope from. You also said you had enabled submission mode via ACL without domain setting. Spec 5.12. says: | By default, no processing of Sender: header lines is done for messages | received over TCP/IP [...] However, when a message is received over | TCP/IP in submission mode, and sender_retain is not specified on the | submission control, the following processing takes place: | First, any existing Sender: lines are removed. Then, if the SMTP session | is authenticated, and $authenticated_id is not empty, a sender address | is created as follows: | * If no domain is specified by the submission control, the local part | is $authenticated_id and the domain is $qualify_domain. [...] | Note: Whenever a Sender: header line is created, the return path for the | message (the envelope sender address) is changed to be the same address, | except in the case of submission mode when sender_retain is specified. If $authenticated_id were u...@examle.com the behavior would match the docs to the letter. cu Andreas -- `What a good friend you are to him, Dr. Maturin. His other friends are so grateful to you.' `I sew his ears on from time to time, sure' -- ## subscription configuration (requires account): ## https://lists.exim.org/mailman3/postorius/lists/exim-users.lists.exim.org/ ## unsubscribe (doesn't require an account): ## exim-users-unsubscr...@lists.exim.org ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
