Wietse, Thanks for the post, it was very helpful. The testing did complete successfully, suggesting that the issue does exist on the Exchange server itself. I'll start digging deeper there looking for the cause.
Thank you, Joel Roberts Network Administrator -----Original Message----- From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Wietse Venema Sent: Thursday, October 13, 2011 5:04 PM To: Postfix users Subject: Re: Attachment Limit Size Joel Roberts: > I can test with telnet and post the results asap. Nothing shows > in the POSTFIX log if I?m tailing it while testing it. The Exchange > logs just say that it?s been rejected by the POSTFIX server. If you believe that Postfix is in error then you must provide POSTFIX logs and POSTFIX error messages, not the "user friendly" version that Exchange users receive because that removes all the important details. First, to verify that the limit is what you believe it is, try this: $ telnet postfixserver 25 <-- You type this command 220 postfixserver ESMTP Postfix ehlo whatever <-- You type this command 250-postfixserver 250-PIPELINING 250-SIZE 20480000 <-- Your message_size_limit, not: 10240000 250-VRFY 250-ETRN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN mail from:<> size=20480000 <-- You type this command 250 2.1.0 Ok <-- Not: 552 5.3.4 Message size exceeds fixed limit If the responses are not as shown above then you made a mistake in the Postfix configuration file. Wietse
