[Mailsync-list] mailsync message identification method question

[Gunter O. <G.O...@po...>]

Hi!

I'm sorry I cannot offer any accessories for inter-human relationships, as=
=20
most other posters here do at the moment. ;)

Instead I just have a short question concerning mailsync.

I'm currently migrating my mail folder hierachie to a new IMAP server=20
using mailsync. During the sync mailsync informed me that - as it is also=20
mentioned in the man page - my drafts do not yet carry a message ID and=20
thus could not be synced.

* Can I just safely switch from Message-ID-based message identification to
  MD5 for all following syncs?

* Will mailsync automagically detect the change and rebuild its internal
  sync tracking information, or will I have to delete its internal
  tracking message?

The man page states that MD5 message identification will hash=20
the "From", "To", "Subject", "Date" and "Message-ID" header fields to a=20
message fingerprint which is used instead of just the "Message-ID"=20
header.

* Wouldn't it reduce the admittedly small probability of a has collision
  if the "Message-ID" header would not be hashed into the MD5 but just
  appended? ie. the message identity fingerprint would consist of an MD5
  hash of the "From", "To", "Subject" and "Date" header fields,
  concatenated with the "Message-ID" header field. In this case a hash
  collision would only misclassify two messages as identical which already
  have the same "Message-ID" header, which they normally should not have
  in the first place.

* Wouldn't it make sense to also hash the message's octet size into the
  message identification hash if MD5 is used? Or may the computable
  message size differ slightly depending on the maail store backend?

I hope someone can shed a bit light on these issued for me. :-)

Greetings,

  Gunter

=2D-=20
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