Odd email errors

[Ashley M. Kirchner]

> 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 at gmail.com>... Host unknown (Name server:
>> alt4.gmail-smtp-in.l.google.com.: host not found)
>>
> Only on a DNS lookup failure.....
>
> egreshko at 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 at 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 at 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 at ivanhoe:~> host alt4.gmail-smtp-in.l.google.com
     alt4.gmail-smtp-in.l.google.com has address 173.194.66.26