[Users] POP3 to IMAP4?

[Michael]

Thanks Andrej, that was helpful. 


> On Thu, 31 Mar 2016 21:12:16 +0200
> Michael <codejodler at gmx.ch> wrote:
> 
> > I asked something similar some time ago but probably didn't express
> > myself clear enough, so it gots not answered.
> > 
> >  * What happens if i copy all mails of a POP account over to a new
> > IMAP account (which would be the same mail account on the providers
> > side) ? I assume they get all uploaded ?   
> 
> Yes, you can upload all the messages, until you hit server-side
> size quota, in case your provider has any.
> 
> >  * What happens then if i copy whole folders with subfolders ? Will
> > the folder structure be preserved ?  
> 
> Yes, at that point, you're working with (creating and populating) IMAP
> folders, so I don't see a problem.
> 
> >  * What happens to mail threads of other accounts, which are sorted
> > into such subfolders, if i copy them over to IMAP ?  
> 
> Nothing, IMAP server has no notions of Claws Mail accounts. Any copied
> messages will just be there, available for Claws Mail or any other IMAP
> client to access them.
> 
> >  * How can i adjust my 100+ filters with least effort, to work for
> > the new IMAP instead the old POP maildir ?  
> 
> That might be simple or tricky, depending on what your filters look
> like. But if all they do is taking messages coming in to INBOX and
> sorting them to various folders, you'll probably only have to adjust
> the destination folder ID.
> (e.g. "#mh/Mail/mycustomfolder" to "#imap/MyIMAPaccount/mycustomfolder")
> 
> If you're moving to IMAP, you might want to switch to server-side
> filtering eventually. That way, any IMAP client you use will see new
> messages sorted into correct folders already.
> 
> > I've got several hundred folders here (with many thousand mails, from
> > several different accounts) and i would be happy to not need doing
> > experiments.  
> 
> Best advice here is: take a backup (and test it), grab a small subset
> of your big mail folder, and test the migration with that sample.
> 
> Good luck!
> 
> Regards,