[Discuss] Mail loop advice?

[gaf at blu.org (Jerry Feldman)]

Kudos to Chris and RCN in this case.
In this case you are the MTA (eg postfix) and that RCN would send email
directly to your host. In any case, when postfix was rejecting the large
emails, RCN interpreted that as a non-fatal, so it would resend at a
later time. Your fix, was to let your system accept it. I'm not sure
what standard rejection postfix does with a message that exceeds the
message-size-limit.

In any case it was not a mail loop. It where RCN was resending the
message in accordance to standard practices.

On 11/13/2013 11:24 AM, Daniel Barrett wrote:
> Dan Barrett wrote in the Boston Linux User Group Discuss List:
>> Seeking advice on terminating an email loop [...]
> Followup: I was contacted by an engineer at RCN, Chris Jackman, who
> helped me identify the root cause of the mail loop.  My home computer
> downloads its email using fetchmail, and its postfix config was
> limiting message size to 10MB, so the bounces were actually
> originating from me, not from my ISP. That's why spamassassin at the
> ISP didn't help.
>
> On Chris's advice, I examined my postfix configuration:
>
> $ postconf -d|grep message_size_limit
> message_size_limit = 10240000
>
> increased the value in /etc/postfix/main.cf, and ran "sudo postfix
> reload".  A few minutes later, I received a copy of the large message
> successfully, rather than causing a bounce, so the new config seems to
> be working.
>
> I don't know why this became a loop rather than just a
> rejection. Regardless, HUGE KUDOS to Chris (and to whoever in BLU
> forwarded him my original note) for going above & beyond the call of
> duty to help a non-RCN customer.
>
> --
> Dan Barrett
> dbarrett at blazemonger.com
>
>
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-- 
Jerry Feldman <gaf at blu.org>
Boston Linux and Unix
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