SMTP Communication Problem.

[Robyn]

We receive the following error when we e-mail to one individual.

There was a SMTP communication problem with the receipient's email server.
Please contact your system administrator. <server name> #5.5.0
smtp;550-207.58.222.227 blocked by ldap;ou=rblmx,dc=comcast,dc=net>

Any one have an idea on what is happening and/or how to fix?

 

[Lizzy]

This basic means your IP address was block by the receiving server. For some
raison your IP address is blacklist on the ldap. See
http://xforce.iss.net/xforce/xfdb/3194 for more info. Is your SMTP server on
a Dynamic IP address?
Lizzy

"Robyn" schreef: