Link to home
Start Free TrialLog in
Avatar of ragesh
ragesh

asked on

550 errors

I am having some problems with some outside clients not being able to send incoming mail.

they are getting 550 errors.  i think this has to do with relaying but our server doesn't allow relaying.
Avatar of slink9
slink9

What version and SP of Exchange Server?
550 is an inconsistent database - http://support.microsoft.com/default.aspx?scid=kb;en-us;Q143235
Avatar of ragesh

ASKER

no this is a 550 error that the sender from other site will receive (as in system administrator error--like when sending to a bad address)

i think sp4 for exch by the way.

Did you check the DNS MX records?

Jake
ASKER CERTIFIED SOLUTION
Avatar of deana080698
deana080698

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of ragesh

ASKER

Thanks...we were on a couple black lists.
No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:
Accept Comment from deana

Please leave any comments here within the next seven days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!

Goldwing
EE Cleanup Volunteer
It may be caused by mail systems having so many MX records that the DNS UDP packets exceed the default size on the PIX (512 bytes)
 
You can fix this at the firewall or on the DNS server itself (we fixed the problem on our DNS servers) by running
 
"dnscmd Server Name/Config /EnableEDnsProbes 0"
 
See

http://support.microsoft.com/default.aspx?scid=kb;en-us;828263

for more info