This is most likely a DNS issue. Make sure you have a reverse DNS entry for your mail server, and set up an SPF record for your domain. This usually will clear up issues like this with yahoo, msn, and AOL.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of sal983 Sent: Tuesday, November 27, 2007 6:43 AM To: [email protected] Subject: [exim] Getting 421 message Hello, When sending mails from our exim mail server to yahoo getting the following error message and sometimes yahoo allowing the mails to deliver to "spam" folder. "2007-11-27 17:00:07 1Ix7Wm-0004RS-DZ == [EMAIL PROTECTED] R=external T=remote_smtp defer (0): SMTP error from remote mail server after initial connection: host a.mx.mail.yahoo.com [209.191.118.103]: 421 Message from (87.87.87.87) temporarily deferred - 4.16.50. Please refer to http://help.yahoo.com/help/us/mail/defer/defer-06.html"; where "87.87.87.87" is our mail server IP. Any help would b great appreciable. Thanks, Muhammed Afsal K.S -- View this message in context: http://www.nabble.com/Getting-421-message-tf4881803.html#a13970943 Sent from the Exim Users mailing list archive at Nabble.com. -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/ -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
