Originally Posted by GnomeyNewt
If I let it sitting say over night or just for a few hours sometimes, it will totally hog my ram. Going up to like 500,000k mem usage. It used to just sit there silently telling me I have e-mail, now it takes over my machine.
Such high memory usage is unusual, most probable reasons are:
a] corrupted New Mail folder. While Pocomail is closed, go to System.pocosys subdirectory and delete all files starting NewMail.pocosys
b] corrupted poco.ini file. Close Pocomail, and rename poco.ini to pocoold.ini. On restart, you might want to re-add the address books.
c] conflict with third party software (usually antivirus, or nVidia's nView)
Apart from what others mentioned, some other popular email clients are Becky from Rimarts, Calypso / Courier, or Eudora.