IPad, IPhone and Outlook 2010 - mail disappearing?

Sorry, perhaps this has already been done to death, but I couldn't find a definitive solution to the problem.

Situation:
POP3-mail issued by provider, no other way of downloading the mail is provided.

• IPad configured to use POP3, ICloud set to push, mail set to fetch (check every 15 minutes), never delete messages from server
• IPhone configured identically to the IPad
• Outlook 2010 configured to use POP3, delete messages on server after 14 days, delete messages on server after deleting them from my trashcan
• Mail is also accessible from webmail

Problem:
This worked like a charm for quite some time, but a few months ago my mail started disappearing.
I get a message that new mail has arrived on both IPhone and IPad. I look at the message and decide that it can wait before I respond.
When I start the computer and Outlook half an hour (or more) later, no email is being downloaded. Checking the webmail, there are no messages.

If I receive new email and I instantly send/receive from outlook after I get the notification on my IPhone, everything works as it should.

I am totally baffled by this behaviour since the pop3-settings on both the IPhone and IPad state that no messages should be deleted from the server, regardless the age and/or whether I deleted them from the IPad.

Can anyone tell me what is going on and how I can fix this or point me to the right resources?
Any more information can be provided if needed.

Thanks in advance
Dennis

This has worked for people in the past.
Go to Settings>Mail, Contacts, Calendars and delete your email account. Then go back and re-set up the email account again with the same info you originally gave to your Internet Service Provider.


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