IIS and SMTP - SMTPSVC Err 4000 Unable to bind to the destination server in DNS.

Author

SMTPSVC Err 4000 Unable to bind to the destination server in DNS.

Joe

2005-04-18, 5:53 pm

Windows 2003 (NOT SP1) IIS 6 SMTP running GFI Mail Essentials and Mail
Security.
My gateway mail server randomly stops delivering outbound e-mails. The only
logging I find is the entry example below in the SYTEM log. The GFI products
are processing e-mails and inbound e-mails are delivered. I can resolve the
MX records for the domains if I manually do an nslookup from this box.
Sometimes they do fail, but rarely. A server reboot gets everything moving
again. Any ideas?

Event Type: Warning
Event Source: smtpsvc
Event Category: None
Event ID: 4000
Description:
Message delivery to the remote domain 'hotmail.com' failed for the following
reason: Unable to bind to the destination server in DNS.