Mail relaying fun

For the second time, my damned ISP has blocked port 25. No real reason, I have secure Linux boxes as the only things sending email; I would get 5-6 server reports a day. That's all. But they blocked me again, and I am sick of arguing with the scripted Indian morons.

Main machine

Anyway, on the main Linux box, ragnarokjr (named so because it is a VM box), I was able to finally get qmail to send all mail thru TLS:

  1. Unpacked netqmail
  2. Applied the full netqmail TLS patch to get base64.h and base64.c
  3. Erased it all and re-unzipped
  4. Copied in the base64.h and base64.c
  5. Applied the ​remote auth patch only
  6. "make qmail-remote"
  7. Copied qmail-remote over /var/qmail/bin/qmail-remote
  8. Edited /var/qmail/control/smtproutes to include name and password:
    :smtp.isp.net:587 username password
  9. Made smtproutes owned by "qmailr" and chmod og-r so it's kinda secured

So now qmail-remote will use TLS on port 587 as needed to get around the stupid block…

Other machines

One of my other machines runs CentOS which uses exim instead of qmail and it took me a while to find ​this FAQ. 

/etc/exim/exim.conf, in the "routers" section:

send_to_gateway:
  driver = manualroute
  transport = remote_smtp
  route_list = * ragnarokjr.revragnarok.com
  no_more

And of course, /etc/init.d/exim restart

Hopefully, this can help somebody else. I was searching all kinds of terms like "exim upstream" (lots of Debian stuff saying what changed from standard) and it took a bit…

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