On 25 Aug 2015, at 13:03, Brian Scholl wrote:

Also, a more theoretical postscript: It seems to me that Benny's reluctance to pursue any sort of .mbox export or local folder option stems from the
notion that such things are intrinsically in opposition to the entire
notion/purpose of IMAP. For example, in one of the ticket replies about such things once upon a time, he wrote: "MailMate really is IMAP only and I
don't have any current plans to change that. Essentially (if you think
about it), 'On My Mac' support is the same as supporting POP3. Messages are
only temporarily stored on the server."

I do like being quoted :-)

That doesn't seem right to me. Embracing the IMAP worldview but then also
limiting the size and complexity of online accounts by periodically
allowing them to be culled to local-only long-term-storage archives doesn't feel the same to me as just using POP3 in a different way. Conversely, it seems like allowing for a local .mbox export (or something like that) in MM wouldn't be some sort of betrayal of its underlying nature. Rather, it
would just be a way for users to adapt true day-to-day IMAP usage to a
longer-term archiving practice.

POP3 has often been used in a way where fetched messages are not deleted immediately, but instead deleted on the server after a certain number of days. This allows multiple clients to fetch the emails before they disappear. This is what I mean with “temporary storage”. Granted, IMAP+local is better than POP3, but that was not my point. My point was that MailMate is an IMAP client and specifically *not* a POP3 client. Local messages would essentially allow MailMate to be used as a POP3 client and I'd really prefer if users did not do that.

I'm not saying that *you* do not have good reasons to want local storage (or POP3), but I don't believe the majority of users need it -- in fact I think it should be discouraged. MailMate is very flexible and you can get POP3 like behavior if you really insist (as described in my other email), but I'm unlikely to ever make it a straightforward feature.

(A concrete example: I teach classes at a university, and during each
semester I will accrete huge online IMAP folders with emails relating to those classes. But then once the relevant semester has finished, I just hate the idea of keeping those folders online forever. Even just the sheer *number* of such folders would become awkward and distracting over time, not to mention the messages they contain. But I also don't just want to delete those messages forever -- since maybe once per year I'll have a need to dive into a previous semester's folders to find something. So this is
practice some sort of betrayal of how I'm supposed to use IMAP?)

If you have webmail then I would probably do it the other way round. I would use “Edit Subscriptions” in the IMAP account editor in MailMate to unsubscribe the mailbox. That would leave the messages on the IMAP server only and if needed they can be searched via webmail (or even subscribed again if needed a lot). This would also save local disk space.

Do others feel similarly? Am I just thinking about this the wrong way?

You are certainly not alone, but some changes are hard. I've been in numerous POP3 vs IMAP discussions over the years, but now it seems that POP3 is rarely mentioned. Instead the (very similar) need for local messages comes up quite often. The best argument for that is privacy, but (some day) I would like to solve that problem in a different way (encryption).

I hope that clarifies my point of view.

--
Benny
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