Cannot send email anymore

[logic]

Hello,

We are not able to send any mail from any of the accounts hosted on the server. It shows the following error:

SMTP Error: Invalid username/password

This happens with webmail as well as when we configure email client and send it also. We have reinstalled exim .
Please help. It is an urgent issue.
Thank you.

[prism4]

We are also not able to send any mail from any of the accounts hosted on the server. It shows the following error:

SMTP Error: Invalid username/password

Does anybodyhave any ideas of what coudl be causing this and is anyone else having the same issues.

Thanks

[nobaloney]

Is da-popb4smtp running on your server?

To check:

# ps waux | grep da-popb4smtp

If not, then find and out why and restart it.

Jeff