Exchange/WinServer 2003 - supporting about 50 users... SP2 for Exchange is NOT installed (working through disk space issues)...
We've been having intermittent problems with the following NDR's for the past week:
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
SMTP error from remote mail server after RCPT TO:<firstname.lastname@example.org>:
host 10.50.204.139 [10.50.204.139]: 550 invalid recipient.
A well trusted consultant informed us that our ISP's SMTP servers were on the fritz and directed us to use DNS to route to each address space on this connector in Exchange/Connector Properties... which we've done.
Right now the problem seems to have subsided considerably but I'm not convinced there won't be more occurrences.
This morning one or more users reported mail not being received by their remote recipients. One of my colleagues spoke to nother consultant who reported seeing these kinds of problems due to a corrupted GAL.
Is this possible? Is there a way to check the integrity of the GAL?