bchesley
asked on
SBS Server MSExchange smtp queues have frozen messages and also received NDR shown in body of question from another domain.
The following recipient(s) could not be reached:
someuser@recipientdomain.c
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
<myserver.local #5.5.0 smtp;554 Denied (Mode: normal)>
This all began after some network (dsl modem, firewall) changes and supression of a spambot attack (cutwail) that had my client blacklisted for a few days. After configuring FW rules to prevent SMTP outbound from any but the SBS server I delisted and most email is flowing freely.
The stuck messages are still retrying from what I can see in firewall activity on port 25 and I did enable verbose logging for the SMTP process.
Is this just a matter of having to get in touch with the affected domains to request delisting internally?
Thanks.
bc
someuser@recipientdomain.c
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
<myserver.local #5.5.0 smtp;554 Denied (Mode: normal)>
This all began after some network (dsl modem, firewall) changes and supression of a spambot attack (cutwail) that had my client blacklisted for a few days. After configuring FW rules to prevent SMTP outbound from any but the SBS server I delisted and most email is flowing freely.
The stuck messages are still retrying from what I can see in firewall activity on port 25 and I did enable verbose logging for the SMTP process.
Is this just a matter of having to get in touch with the affected domains to request delisting internally?
Thanks.
bc
ASKER
Thanks for these links. I had read both and tried changing the smtp domain setting to the external domain as it was set to an internal address (NAT in firewall).
I also was exploring this link http://technet.microsoft.com/en-us/kb/kb.aspx?id=324958#6
specifically the section titled 'Clean up the Exchange Server's SMTP queues' which seems to indicate that I just have to delete the stuck queue messages. I did verify that the server was not an open relay server so it should not be allowing any spam through. When I drill into the queued messages they are all legitimate from and to addresses.
I also was exploring this link http://technet.microsoft.com/en-us/kb/kb.aspx?id=324958#6
specifically the section titled 'Clean up the Exchange Server's SMTP queues' which seems to indicate that I just have to delete the stuck queue messages. I did verify that the server was not an open relay server so it should not be allowing any spam through. When I drill into the queued messages they are all legitimate from and to addresses.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
Blacklisting information was spot on but response did not address frozen outbound queue aspect of inquiry.
Look here - same problem:
http://forums.msexchange.org/m_1800483410/mpage_1/key_/tm.htm#1800483410
or
https://www.experts-exchange.com/questions/24241885/Exchange-2003-5-5-0-smtp-554-Denied-Mode-normal.html (related solution :) )