[BUGS] Sendmail relaying based on recipient

[John Marshall]

On Thu, 06 Feb 2014, 01:18 +1100, Jerahmy Pocott wrote:
> So for example bob at domain, joe at domain and fred at domain should be delivered to some
> local users while all other @domain should go to estmp:domain.relay.

The way I do this for foreign domains is with virtusertable.  You need
to enable the features in your sendmail.mc file:

  VIRTUSER_DOMAIN_FILE(`/etc/mail/virtuser-domains')
  FEATURE(`virtusertable')

In the VIRTUSER_DOMAIN_FILE, list the domains (one per line) that you
want sendmail to check in the virtusertable; then use virtusertable to
point the particular foreign addresses at the required local address.

So, from your example, in virtuser-domains:

  domain

and in virtusertable:

  bob at domain	%1
  joe at domain	harry
  fred at domain	harry

In this case, mail addressed to bob at domain would be delivered to the
local address bob; and mail addressed to either joe at domain or
fred at domain would be delivered to the local user harry: all other mail
for @domain would be relayed according to DNS MX for @domain unless you
override that in mailertables as you mentioned.  Note that
virtuser-domains is not a map, so you would need to restart sendmail to
read any changes you make to that file.

See cf/README in the sendmail distribution for the official explanation.

-- 
John Marshall
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