On 13 Oct 2011, at 23:08, Joel Roberts <joel.robe...@pinkardcc.com> wrote:
> Hi all, new to the group. Have recently setup POSTFIX as an SMTP relay front
> end to an Exchange 2007 backend. Have encountered the following issue:
>
>
>
> I'm using POSTFIX as an SMTP fronted relay to an Exchange 2007 backend. The
> default size for attachments in POSTFIX is 10 MB. I've set that in the
> configuration file to be 20 MB. When I look at postconf -n it verifies that
> the limit is set to 20 MB, (message_size_limit = 20480000). I've stopped and
> restarted the postfix service, but messages are still bounced back to my
> Exchange server as undeliverable if they exceed 10 MB in size.) The
> bounce-back message users receive lists the Debian Linux / Postfix server as
> the server bouncing it back for exceeding size. Is there somewhere else this
> needs to be set?
>
> The error message I get from exchange is:
>
>
>
> This message exceeds the maximum message size allowed. Microsoft Exchange
> will not try to redeliver this message for you. Please make the message
> smaller -- by removing attachments, for example -- and try sending it again,
> or provide the following diagnostic text to your system administrator.
>
>
>
> The following organization rejected your message:
> {POSTFIX_SERVER.OUR_DOMAIN.com.
>
>
>
> Thank you,
>
>
>
> Joel Roberts
>
> Network Administrator
>
>
>
Joel,
Prove it's Postfix that's rejecting your downstream mail. Show the Postfix
logs; the eventvwr log from Exchange or the log of you following the Postfix
author's suggestion of a telnet session and its output.
Did you check Curtis' suggestion too (that it's the Exchange Server that
requires configuring also)?
-- Mark Homoky.
Sent from my iPhone
