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POP3 Mail Collection is when VPOP3 will collect mail from an external POP3 mailbox - for instance, from an Internet Provider.
This page tells VPOP3 how to collect mail.
If the maximum message size is exceeded, VPOP3 will send a message to the intended recipient(s) asking if they want to download the message. If they reply to that message, VPOP3 will download the message at the next scheduled connection as long as the message was not first seen over 14 days ago
If Leave Messages On Server
is set too large, you may get problems with the mailbox at your mail service provider filling up. If it is set to 0, then VPOP3 will delete the messages immediately after download - however, if the connection is dropped before VPOP3 can successfully log off the remote POP3 server, that remote server will automatically undelete any messages which were deleted during this session.
Like other mail software, VPOP3 uses the UID
values of messages to determine whether the messages have been downloaded before. UID
s are set by the remote POP3 server.
There are two situations where this can cause problems:
UID
s too quickly, you may get missed messages. For instance, if VPOP3 downloads message '1', deletes it, then logs on again and sees message '1' again, it may think that the ISP failed to delete the message for some reason, so will not download it. In fact, it may have arrived between the two login attempts. If VPOP3 is the only software collecting mail from the ISP, then this problem can be alleviated by setting Hold Obsolete UIDLs for x Days
to 0 days on the Settings -> Misc Settings -> Advanced page. However, it is really a badly behaving POP3 server at your ISP, so it should be reported to themUID
s to existing messages, you may get duplicate messages. If you tell VPOP3 to delete messages immediately, that should fix this problem. Note that the POP3 standard explicitly says that this should not happen, so if it happens frequently, it is usually a sign of a problem at the ISP, or someone there not understanding the standards properly, and it should be reported to them. (See section 7 [UIDL] of RFC 1939)VPOP3 has five different ways of handling mail it collects using POP3