Timo Sirainen explained:
On Tue, 2003-08-19 at 04:07, Eric S. Johansson wrote:
in theory it would be possible to retrieve using pop3 and then push using imap but that is too ugly to even contemplate.
Well, UW-IMAP supports that. I've actually thought about supporting as well :) It would work better to poll the pop3 box only when IMAP's INBOX is being accessed by IMAP client. Luckily this can be implemented as a plugin.
it's one of those "just because you can do it, doesn't mean you should" situations. One of the big problems is that you bypass a lot of normal mail system functionality like antivirus or antispam filters. In my antispam system (camram), I'm currently using procmail as a way of intercepting the mail stream and working on the messages. Depositing messages via an imap backdoor would totally bypass filtering.
Additionally, if you use a collect pop3 box and multidrop distribution, you reduce your security exposure because only one password known (i.e. that for the pop box) versus 1 for every user.
I will need to look into the plug-in capability real soon now because it might be a good way to implement a correction mechanism for messages that aren't caught by the filter.
---eric