We are currently running Imail 7.07 on a Windows 2K behind a Cisco PIX firewal (fixup smtp has been disabled). Most of our mail seems to be working correctly but one of our users has reported that one particular person cannot e-mail to her e-mail address on our server. The recipient receives all other messages without any problem and her address is legit. The sender first receives delay notifications and then a returned message. I have posted a sample returns below. All I can find out about this error is that it seems to be some sort of time-out issue on our (recipient) server, but I can't determine why it occurs and for only one (known) domain.
Sender's returned message
Your message To: [EMAIL PROTECTED] Subject: FW: health insurance Sent: Mon, 7 Jul 2003 12:50:28 -0400 did not reach the following recipient(s): '[EMAIL PROTECTED]' on Wed, 9 Jul 2003 12:55:06 -0400 Could not deliver the message in the time limit specified. Please retry or contact your administrator. <MAIL.ca.lcl #4.4.7>
This appears to be an issue on their end. That's a human readable error message, which means that it means whatever the programmer of their mailserver wants it to mean (IE it isn't a standard error message). http://www.dnsstuff.com/tools/traversal.ch?name=nasw-pa.org&type=MX shows that the MX record for nasw-pa.org is fine; http://www.dnsreport.com/tools/[EMAIL PROTECTED] shows that E-mail to that address works fine.
The only thing I can think of that would be a problem on your end is if you either blocked their IP address or their E-mail address. Have you checked your IMail SMTP log file to see if there are any connection attempts from them around that time? That would provide some clues.
-Scott
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