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P.Péter
Asked: 2018-02-20 08:32:58 +0800 CST

exim refusing to handle virtual domains after upgrade to debian stretch

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I have a machine that handles multiple virtual domains. Some of these include aliases defined for those specific domains (domain names will be changed from real names).

I have, for example:

$ cat /etc/exim4/virtual/alias.domain.com
hibak: "|/usr/local/bin/mail2redmine.sh blah"

And, of course alias.domain.com is included in dc_other_hostnames in /etc/exim4/update-exim4.conf.conf.

It worked fine on debian jessie, but after upgrading to stretch, the virtual hostnames ceased to work. Getting a letter for them created such an entry in the rejectlog:

2018-02-19 17:03:21 H=from.host [REDACTED] F=<REDACTED> rejected RCPT <[email protected]>: Unrouteable address

exim -bt [email protected] returns

R: system_aliases for [email protected]
[email protected] is undeliverable: Unrouteable address
exim

1 Answers

  1. I discovered the wonderful debug mode for exim (exim -d -bt foo@bar), thus being able to compare what goes on in a debian jessie and debian stretch system with virtual domains.

    The main difference seems to be that the vdom_aliases router is missing from /etc/exim4/exim4.conf.template, which got updated without prompting during upgrade as I did not modify it at all before. I copied the section for the vdom_aliases router from exim4.conf.template.dpkg-old, and it started working.

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