2 Replies Latest reply: Nov 25, 2010 10:52 PM by julius ong
julius ong Level 1 Level 1 (0 points)

i have setup a mail server w/ mac osx snow leopard mac mini, and i have setup the smtp and open relay to spesific IP address.

Now everything looks fine for all the users, except for the users that using outlook express, they can retrieve emails, but can not send.

the error message is like this :

The message could not be sent because one of the recipients was rejected by the server. Server Error: 504, Error Number: 0x800CCC79

MacbookPro, Xserve, Macpro, Imac, Mac OS X (10.6.3), unix