THUNDERBIRD EMAIL CLIENT ERROR MESSAGE

[StateOfCompleteness]

"An error occurred sending mail: The mail server sent an incorrect greeting: concurrent connection limit in avast! exceeded(pass:0, processes:thunderbird.exe[50])."

What does this mean? Anyone know the solution?

[sded]

What OS and version of avast! are you using?  Is this an encrypted mail system like gmail or non SSL?  Was email working previously with avast! or is this a new installation?   What is your TB server setup?
Mozilla says this error means:
An error occurred sending mail: The mail server sent an incorrect greeting: message:

You specified the wrong server. The server you specified exists, but it is not an SMTP server.
You specified the wrong port number. Ask whoever runs the SMTP server what the correct port number is.
The server is down. This is usually temporary. If it persists, contact whoever administers the server.
Your firewall is blocking the port.
Your ISP is blocking the port. This often affects port 25, and you can often work around it by using port 587, but details depend on your ISP and on the SMTP server's configuration.

[spg SCOTT]

avast! knowledgebase: avast! 5.x: Error message '421 concurrent connections limit in avast! exceeded' is displayed

[DavidR]

Whilst this knowledgebase article shows how to increase the max concurrent connections, it fails to resolve why it is happening in the first place.

@ StateOfCompleteness
The faulting application eating all the connections is thunderbird.exe and I would have to ask why it is doing that as this doesn't happen on my installations (winXP and Win7 systems) of thunderbird.

So are you using thunderbird for newsgroups as well or something like that where it is downloading using large numbers of connections ?

I have only been using thunderbird for a few months now so I'm not familiar with all its settings, so I don't know if you can use it in this way.

[TEDDU]

     >:(An error occurred sending mail: The mail server sent an incorrect greeting:  concurrent connection limit in avast! exceeded(pass:0, processes:thunderbird.exe[50]).