sjj,
Avast is telling you simply that another program is already using port 25 which is the default port that Avast uses to monitor the email.
You can go at this in one of two ways:
Firstly, determine which program is using port 25. It may be a program that is not essential, and you can remove it from the startup using MSConfig.
How do you identify the program? Well, you can download a simple utility here:
http://www.jpsoft.dk/download.html"Local Port Scanner" will identify which programs are using what ports on you machine.
Secondly, you can change the default values of POP3, SMTP and IMAP in the Avast ini file, increasing them by "1"
Should you decide to try this, I will look up the thread in the forum and give you the infod in my next post.
Good luck
Okie Dokie....here is the info:
If the POP(3), SMTP or IMAP port is already used by another program,
you need to change that port numbers. The default values are:
POP(3) - 110
SMTP - 25
IMAP - 143
It is necessary to change that that ports, otherwise avast! can scan
your mail - you can increase the numbers e. g. by one.
1) Close your email program
2) In Notepad open the file AVAST4.INI (it is in
C:\PROGRAM FILES\ALWIL SOFTWARE\AVAST4\DATA)
3) Into the section [MailScanner] insert these rows (or change them,
if they already exist):
SmtpListen=127.0.0.1:26
PopListen=127.0.0.1:111
ImapListen=127.0.0.1:144
4) Save the file
5) Start Outlook Express
6) Choose TOOLS -> ACCOUNTS
7) Select your mail account and press PROPERTIES

Select ADVANCED
9) Change the port numbers to the same values as in step 3)
10) Confirm changes
11) Restart your computer