[Cialug] Postfix Fubar <g>!

[Zachary Kotlarek]

On Jul 26, 2012, at 3:39 PM, L. V. Lammert wrote:

> Produces a SUCCESSFUL send via Gmail! WTF?? It's NOT the distro (another
> system with the same distro works fine), there has to be somthing farkled
> in this 'migration' from an old Mandrake system to SuSE.
> 
> Any thoughts on how to identify the actual problem, instead of hacking a
> fix by substituting the IP, would be greatly appreciated.


Two things:

A) Depending on how your installation of postfix is setup it will run some services chroot'd. Check for a /var/spool/postfix/etc/resolv.conf (or equivalent if you don't use /var/spool/postfix) and make sure it matches your actual /etc/resolv.conf. If you don't have such a file try adding one (note that it must be a copy or hard link; symlinks won't work through the chroot).

B) `dig` does not use the standard hostname resolution routines (for example, is not influenced by /etc/nsswitch.conf) -- instead it reads /etc/resolv.conf directly. So it's not the best way to check that your system is correctly resolving DNS queries.

	Zach

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