We use Google Apps for email with our domain
[ec2-user@example ~]$ dig MX example.com … ;; ANSWER SECTION: example.com. 300 IN MX 1 aspmx.l.google.com. example.com. 300 IN MX 5 alt1.aspmx.l.google.com. example.com. 300 IN MX 5 alt2.aspmx.l.google.com. example.com. 300 IN MX 10 aspmx2.googlemail.com. example.com. 300 IN MX 10 aspmx3.googlemail.com. …
On the same domain we have an EC2 instance running, with Amazon Linux AMI
sendmail works fine for non-example.com addresses. However,
for example.com-addresses, it tries to deliver mails locally, which fails for
users that exist only on Google Apps. Interestingly this is despite
local-host-names being empty.
To avoid local delivery attempts, can we set up
sendmail so that it sends all email
through Google’s SMTP server (requires authentication)? Would that be a good idea? Or is
there a better solution?
Also, it would be interesting to configure the server to send email to
ec2-userto the Google Apps user
firstname.lastname@example.org. I guess, we would use mail aliases for that.
[ec2-user@example ~]$ hostname --fqdn example.com
Of course, the actual server name is not
example.com. It’s another
As requested by @AndrzejA.Filip:
[ec2-user@example ~]$ echo '$j' | sendmail -bt ADDRESS TEST MODE (ruleset 3 NOT automatically invoked) Enter <ruleset> <address> > example.com > [ec2-user@example ~]$
You named your server
example.com, the naked domain name. Thus many programs (sendmail included) take you at your word, and consider that the local server does everything related to that domain name.
To resolve the problem, rename the host. For this and a variety of other reasons, no server should ever be named with only its naked domain name.
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