Sending mail from other labs
Many labs do not allow you to send mail via their SMTP server, or even block completely outgoing SMTP connections.
If you can't use the local SMTP server
The easiest solution is to have an account with GMail, and configure it to allow you to send mail also with other
If you can't connect to GMail
This usually means that the local network is blocking outgoing SMTP - unfortunate, but not unusual, in times of ever increasing SPAM. Then the only remaining possibility is to use the PSI server, via an SSH tunnel:
ssh -L 1025:localhost:25 psi.phys.wits.ac.za
then just point your mail program to SMTP server
localhost, port 1025. Of course this will only work if you can use SSH; but most of all it can be quite slow...