Catchall Router on Exim does not work

Question

I have setup a catchall router on exim (used as last router):

catchall:
  driver = redirect
  domains = +local_domains
  data = ${lookup{*@$domain}lsearch{/etc/aliases}}
  retry_use_local_part

This works perfectly when sending emails locally. However, if I login to my GMail account and send an email to [email protected], then I get an "Unrouteable Address".

Thank you for any hints to solve this issue.

Answer 1

For this router to work, make sure that

1. mydomain.com is in local_domains
2. there is an entry for *@mydomain.com in /etc/aliases
3. MX record for mydomain.com is pointing to the server, where you've configured this

Answer 2

In the system_aliases: section of the config file you already have a section which does the lookup in /etc/aliases.

Replace
    data = ${lookup{$local_part}lsearch{/etc/aliases}}
with
    data = ${lookup{$local_part}lsearch*@{/etc/aliases}}
and make sure you have "*:catchall_username*" in /etc/aliases

This works great for a single domain mail server which is already using /etc/aliases.