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