Since about 10 days I'm having problems retrieving my messages. When I log on to my ISP's website to see the email I'm waiting for I can see it there, this is especially bad when the email that was sent to me has an attachment. Some of the messages with attachments won't be downloaded at all, other messages take 15 minutes or more to be downloaded to my inbox. When I'm trying to send messages I receive quite frequently an error that the message can't be copied to the 'sent folder'. Sometimes the sending of the message completely fails, sometimes it requires 2 or 3 attempts for it to go through. I'm at a loss what to do to fix this error. The ISP swears that everything is fine on their end.