Does anyone have any suggestions?

Our server, which runs the mail (sendmail) and various other things, ran
out space over the weekend and mail stopped working.

Having clear out some space i am now able to send email to destinations
outside our network and also to send and recieve mail for local users.
However still no incoming mail from outside the network.

I've restarted sendmail but that doesn't seem to make any difference.

I notice that telneting to port 25 and running a simple command eg

vrfy <a user>
generates a NOQUEUE message on our syslog

Regards

Mike