From: Gunter O. <G.O...@po...> - 2006-11-07 16:04:46
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Am Dienstag, 7. November 2006 12:57 schrieb Holger Krull: > > * Can I just safely switch from Message-ID-based message > > identification to MD5 for all following syncs? > I assume both question get a yes as an answer. But that is only because > i never noticed any error when i did so, not insight in the inner > workings of mailsync. Could be just coincidence. Ok, that suffices me. ;) I just wanted to know if changing the algorithm=20 would be a guarantee to nuke both mail stores or if it had a chance to=20 work. ;) Thanks a lot, I just started a new sync with the md5 algorithm. > But as you have your old emails savely stored on the old imap server > you should just try and if things fail: delete all emails on the new > one and start over. Hu, I'd rather like to avoid that - the old server is rather slow, iss=20 attached to a thin pipe and the amount of data is pretty massive... ;) > > * 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 > If they don't have the same Message-ID they can't get the same hash. So Well, they can. As I mentioned I admit that it's a rather unlikely event=20 and it probably won't ever happen, but according to murphies law if it=20 DOES happen, it won't only be like shooting myself in the foot but rather=20 comparable to blowing my own leg of... And I'd rather like to avoid that=20 experience. ;) > Appending has no advantage over hashing. Just makes comparison uglier. Well, it'd make the pretty unlikely collision even more unlikely, as in=20 this case an md5 hash collision and an equal Message-ID must happen at=20 the same time to different messages in the same folder. That's be=20 something even I would call "practically impossible". > > Or may the computable message size differ slightly depending on the > > mail store backend?=20 > Unfortunately yes. You would need to read the whole mail and count > bytes. Ah, I see. That's bad. Greetings, Gunter =2D-=20 *** Powered by AudioScrobbler --> http://www.last.fm/user/Interneci/ *** 16:52 | Scooter - Mesmerized 16:46 | Scooter - Devil Drums *** PGP-Verschl=FCsselung bei eMails erw=FCnscht :-) *** PGP: 0x1128F25F *** |