Best way to move mail from one server to another

[Sami Ketola]

> On 4 Sep 2018, at 19.32, Rick Romero <rick at havokmon.com> wrote:
>> No it does not. This is different thing. This is about managing duplicates on multiple syncs.
>> Imapsync seems to keep track of UID -> MAIL mapping for server A and UID -> MAIL mapping for server B so that on multiple runs it does not sync the same messages again. However it does not use the same UID -> MAIL for server B as is originally on server A. And that is the problem.
> That's not what you said, you said there was a client sync issue.  That's definitely an issue (especially if you run Mac Mail).
> 
> Ignoring duplicates on multiples runs is a non-issue, even with the 2011 version.  Recording UIDs is not necessary for that.
> 

Nope. I said that with imapsync there is no way to preserve the same UID for a mail on the destination. Data is lost.

If the UID -> MAIL pairs are not kept then client caches need to be invalidated and redownloaded.

Sami

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