For some unknown reason, (Virgin?), batches of messages fail becasue there is one or more so big it takes too long to download. This causes dupcation, tripication sometimes. However, eventually all msges arrive satisfactorily.
If you install free Mailwasher this wil llst all messages which are ready to be rec'd and you may well see one very big file, a Realplayer one perhaps, which could impede the flow of messages.
You can delete such msges in Mailwasher, leaving the rest to arrive pronto.