Hey there folks, Hope someone out there has a solution to my prob., as it is frying my brain. I have about 55 computers with 2000 pro on them, all have eudora on them (5.1) and were working fine, as I installed the last say 8 or 9 all (they had the updated 5.2 on them) I have that no sending problem, but if I put the info in Outlook express it sends out no prob. I have a server (2000 server on it) no problems with network or internet connections. My ISP connection (DSL) is different than my email server (thought it may be a SMTP prob but why do some work and some don't?). Tried uninstalling 5.2 and revert back to 5.1 but no luck - can recieve just not send. Any help would be greatly appreciated!!