mouss at netoyen.net
Wed Sep 24 21:53:33 UTC 2008
Andrew Norris wrote:
> John Kordash wrote:
>>> mail.bobhoffman.com != bobhoffman.com
>> Careful here. Email senders have nothing to do with MX records.
>> Email receivers do.
>> I believe bobhoffman.com is the email sender in this case.
>> I would doubt this is an issue. Any split in/out mail server is going
>> to have a different host for receipt (MX) than send.
> You're right, I was making an assumption I shouldn't have. Namely that
> there was a single host/ip for both sending and receiving email. Going
> back to the logs he posted I'd say that assumption was correct in the end.
> From the yahoo headers:
> "Received: from 18.104.22.168 (EHLO mail.bobhoffman.com)"
> So his MTA is EHLOing as mail.bobhoffman.com
> mail.bobhoffman.com resolves to 22.214.171.124 (matches the incoming ip)
> 126.96.36.199 reverses to bobhoffman.com (which doesn't match the host)
> As far as I can tell this will hurt his score.
no, it won't.
- his IP is 188.8.131.52. This resolves to bobhoffman.com, which resolves
back to the IP. all good.
- his helo is mail.bobhoffman.com, which resolves to 184.108.40.206, which
is the server that sends mail. that's more than perfect.
- his helo starts with "mail.". He gets a bonus in some places.
> Or am I missing something?
"double lookup" is IP -> name -> IP. you don't do name -> IP -> name.
More information about the CentOS