Title: Message
EHLO!
03:28 10:03 SMTP-(0000018B) Trying isbe.net (0)
03:28 10:03 SMTP-(0000018B) Connect isbe.net [206.166.97.102:25] (1)
03:28 10:03 SMTP-(0000018B) 220 smtp-relay3.isbe.net Mail essentials  server (2.422) ready for ESMTP transfer
03:28 10:03 SMTP-(0000018B) >EHLO dns.mgtamer.com
03:28 10:03 SMTP-(0000018B) 502
03:28 10:03 SMTP-(0000018B) >HELO dns.mgtamer.com
03:28 10:03 SMTP-(0000018B) 250 PIPELINING
03:28 10:03 SMTP-(0000018B) >MAIL FROM:<[EMAIL PROTECTED]>
03:28 10:03 SMTP-(0000018B) 503 I wait for mail from first
03:28 10:03 SMTP-(0000018B) ERR undeliverable 503 I wait for mail from first
03:28 10:03 SMTP-(0000018B) SMTP_DELIV_FAILED
03:28 10:03 SMTP-(0000018B) >QUIT
03:28 10:03 SMTP-(0000018B) 250 >[EMAIL PROTECTED] Sender Okay
03:28 10:03 SMTP-(0000018B) Creating message from Postmaster
03:28 10:03 SMTP-(0000018B) finished C:\IMAIL\spool\Q30a8136.SMD status=2
 
I think the problem is the "502" on the 5. line. That doesn't fit in here, and the remote server behaves as if it has never sent a "502". He waits for mail on the first connection. Instead your mail server makes a second connection (because of the "502"), and tries to send mail on that connection, but this gets refused.
 
The remote server refuses with a "502" the EHLO command, although it states with "esmtp" that it can speak ESMTP.
 
Hermann

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