According to this page:
http://help.lycos.com/kb_article.php?ref=7564-GSMY-9420

The iphone is set by default to never delete messages from the server. I guess that works pretty well for people like me who share the email address with my desktop computer along with my calendar and contact list. The setting can be changed by the user and the page has a picture describing how to do that in the advanced settings.

Bob Fera wrote:

Greetings,

I have a user who is accessing a Surgemail account via POP3 with an iPhone. The iPhone POP client will only leave messages on the server after downloading them (no way to turn off), and regardless of the number of days it's set to leave the messages for, it appears to never, ever actually do it. The user refuses to delete anything manually. Thus, messages just keep accumulating in the guy's inbox on the server. Is there a way to get Surgemail to automatically delete read messages after, say, 7 days for a single account? I've been hunting around the admin interface and can't find anything...

Thanks!

Bob

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Bob Fera
I.T. Manager
Zenith Information Group
18757 Burbank Blvd., Suite 116
Tarzana, CA 91356
Phone: 818-206-8634 Ext. 160
Fax: 818-345-2605

Members of NACHA
The Electronic Payments Association