On 04/29/2012 08:17 AM, Ashley M. Kirchner wrote:
> Anyone here seen these before? It seems some e-mails are getting through and
> others aren't, and those that don't produce this error:
>
> ----- Transcript of session follows -----
> 550 5.1.2<kirash4@gmail.com>... Host unknown (Name server:
> alt4.gmail-smtp-in.l.google.com.: host not found)
>
Only on a DNS lookup failure.....
egreshko@meimei xorg.conf.d]$ host
alt4.gmail-smtp-in.l.google.com
alt4.gmail-smtp-in.l.google.com has address 173.194.73.26
That's the odd part. The server that's producing those errors CAN
resolve that host just fine. Note, that hostname has several round
robin IPs, except I have not been able to get the .73.26 one that you
came up with:
[1] 20:54:28 <kirash@ivanhoe:~> host
alt4.gmail-smtp-in.l.google.com
alt4.gmail-smtp-in.l.google.com has address 173.194.67.27
[2] 20:54:30 <kirash@ivanhoe:~> host
alt4.gmail-smtp-in.l.google.com
alt4.gmail-smtp-in.l.google.com has address 173.194.67.26
[3] 20:54:31 <kirash@ivanhoe:~> host
alt4.gmail-smtp-in.l.google.com
alt4.gmail-smtp-in.l.google.com has address 173.194.66.26