cannot send email w/mac mail using Juno and Tiger

I have exactly the same problem using Mail and my .mac account: i can get incoming mail, but can'ts send mail.

My hunch is that it could be a firewall thinkg? I've asked .mac support and if i get the answer, i'll post it here

PowerBook G4 Mac OS X (10.4.4)

Regarding not being able to send mail with your .Mac account and .Mac SMTP server, most if not all ISPs used for connecting to the internet block the use of SMTP servers outside of their network on Port 25. Some ISPs allow the use of an authenticated SMTP server only (such as the .Mac SMTP server) that is outside of their network on Port 25 but some block its use regardless. These restrictions are in place as part of an overall effort to prevent or reduce spam eminating from the ISP's domain.

Something to try.

Go to Mail > Preferences > Accounts and under the Account Information tab for your .Mac account preferences at the SMTP server selection, select the Server Settings button below.

At the Server Port field, enter 587 in place of 25 and when finished, select OK to save the changed setting.

If this is not successful, select/use your ISP's SMTP server to send mail with your .Mac account which is invisible to all recipients.

sorted: well for .mac accounts at least: in the server settings for your smtp server, change the port number from 25 to 587