General SMTP Failures on inbound E-Mail
Posted on 2009-04-16
I'm having some difficulty receiving some email messages. One sender in particular is seeing a 10% failure rate on mail to my domain. We are also starting to see some errors with mail from g-mail and others. The message from that one particular domain come back with the following:
Your message has been delayed. The server will continue trying to forward the message. You do not need to resend the message.
Apparent cause of delivery failure:
An SMTP protocal error occured while sending this message.
The delay affects the following recipients:
The messages from gmail are getting bounced with the following:
This is an automatically generated Delivery Status Notification
Delivery to the following recipient failed permanently:
Technical details of permanent failure:
Unspecified Error (SENT_MESSAGE): Connection timed out
According to our internet provider, our connection has been up and stable for 45+ days. No changes have been made to our exchange environment either. We did have to reinstall SMSMSE recently with assistance from Symantec support.
Here is the breakdown of my network
TW Business Class Internet
Cisco ASA 5505
MS Server 2003SE R2 SP2/Exchange 2003 SP3
Any recommendations? I've checked the message logs and don't see the messages ever getting to exchange based on the times I've seen failures. Thanks for all of your help.