I am using SuSE Linux 9.2 at first, "Thunderbird" worked fine but now it receives only but does not send.. somehow the SMTP outgoing got broken. Then I tried the "Kmail", the program will download the mail then freeze part of the way. When I go through the mail, it takes for ever to move files and/or delete them... KMail keeps freezing up. Any suggestions for a mail system that works with SuSE Linux 9.2?

If you're looking for graphical type emails, I've used Evolution before. It's more like MS Outlook (calendaring, etc).

If you don't mind text email, you can try pine or mutt.

Is there a serious linux e-mail client that supports multiple accounts, filtering etc.?

Kmail and evolution are both similar to ms-outlook. Under windows I used TheBat, which is way more sophisticated and efficient than outlook, and the apparent lack of a comparable e-mail client for Linux is one of the greatest problems that prevent me from switching fully.

Do you have more than one pop mail account with different ISPs? If so, your current (the one you pay each month) will let you receive any pop mail addressed to you. However, many ISPs don't sending mail from another ISPs system through their server and will reject it. Happened to me and took me a good while to figure out what was wrong (this was using Thunderbird, by the way). Example:

bob@firstISP.com tries to send an email from bob@secondISP.co.uk through firstISPs servers. Won't work, mail is rejected.

This may not be your problem because you did not mention multiple addresses. Thought I would mention it as a possibility with Thunderbird.

Bob

That's part of the reason why e-mail clients like kmail or evolution (or ms-outlook) may be insufficient, although they can handle multiple ougoing-mail servers. What they lack is a true seperation of these accounts, which makes handling mail coming from many different accounts that have to remain separate difficult.