Upgraded to 10.4 last week. Apple mail has been running fine. Yesterday I got an email from my isp telling me that my mail box was full. I went into prefs and checked delete mail as being read. I went into web mail and deleted all of the emails. Today around lunch email started quitting. I restarted email got to the main screen when it went to get email from isp went it quit. Reinstalled 10.4 but this didn't help. I have 2*2 G5 with 512 gig ram. Ram upgrade tomorrow. Any ideas would be appreciated. TIA Bob