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<p dir="auto">On 26 Mar 2018, at 0:44, Roger Bohn wrote:</p>
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<div style="white-space:normal"><blockquote style="border-left:2px solid #777; color:#777; margin:0 0 5px; padding-left:5px"><p dir="auto">Today I am getting a message about needing to resynchronize ALL my mailboxes with the server. MM is marching through them all, in alphabetical order. This is the third time this has happened in about 3 months. What could possibly be causing this?</p>
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<p dir="auto">For some reason the server changes the “identity” of the mailboxes (the UIDVALIDITY values). MailMate has no other option than to forget what it knows about the mailboxes and refetch emails. The problem is that what MailMate knows as, for example, message number 42 might no longer be message number 42. If MailMate doesn't resynchronize then if you delete message 42 then a different message might be deleted on the server. This would naturally be a very serious problem.</p>
<p dir="auto">MailMate <em>could</em> try to work around the problem by being smarter in the resynchronization process (trying to re-map emails by only getting a subset of email headers and/or message size). But this is non-trivial and I doubt any email clients do that.</p>
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<div style="white-space:normal"><blockquote style="border-left:2px solid #777; color:#777; margin:0 0 5px; padding-left:5px"><p dir="auto">The server is listed as:<br>
outlook.office365.com</p>
</blockquote><blockquote style="border-left:2px solid #777; color:#777; margin:0 0 5px; padding-left:5px"><p dir="auto">The warning message says “If this happens often then you should investigate the issue.” How do I investigate?</p>
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<p dir="auto">This means contacting the IMAP server provider to let them know that there is a serious (performance) problem. In this case though it might not matter much. I doubt that they are unaware that the problem exists.</p>
<p dir="auto">I'm sorry I don't have a better answer for you. If you want to make 100% sure this is an IMAP issue (and not MailMate) then make a copy of the following file:</p>
<pre style="background-color:#F7F7F7; border-radius:5px 5px 5px 5px; margin-left:15px; margin-right:15px; max-width:90vw; overflow-x:auto; padding:5px" bgcolor="#F7F7F7"><code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0" bgcolor="#F7F7F7">/Users/<username>/Library/Application Support/MailMate/Messages/IMAP/<account>/State.plist
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<p dir="auto">After the next time you see the issue then copy it again and send me both files. Then I'll make sure that the UIDVALIDITY values really changed.</p>
<p dir="auto">-- <br>
Benny</p>
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