I've noticed a delay of 5-8 seconds loading each page in webmail (via Squirrelmail, neomail, or Horde).. All other pages on the server open quickly, even cpu-intensive pages such as PHP forums, or Chat-pages..

IMAP access, and POP access are fine..

Does anyone have an idea why this might be happening, or what I should check? I could tear down the IMAP server and rebuild it (I presume that's what these are reading from), but that seems to be in the wrong direction..