Hello, In the Message; Subject : Re: [oS-en] Finding duplicates in email Message-ID : <c800e49f-6c34-b328-9b01-30af5a1bb4f3@telefonica.net> Date & Time: Tue, 4 Jul 2023 11:40:20 +0200 [CER] == "Carlos E. R." <robin.listas@telefonica.net> has written: [...] MN> > In my case, with the .procmailrc setup, there are no duplicate emails MN> > at all. CER> I was merging mail from the laptop with the desktop machine, and as my sync CER> process would not work for many moons, when I decided to repair CER> that there was a backlog of thousands of mails. I happen to have CER> very complex procmail recipes. The result were duplicates. Ah, I see. But, the recipe for duplicate emails is not complicated. [...] MN> > Duplicate mails should be determined by the unique Message-ID for each MN> > mail. CER> Not exclusively. CER> For example, when people reply both to the list and to the CER> person, you get two copies of the same mail, slightly CER> different. Same message-id, different received headers, possibly CER> a different footer and reply to. ..? If you look at the To: and Cc: field of an email, you can see multiple recipient's addresses,, don't you. So, one email should be enough. CER> My procmail recipe moves one of those to a different folder for direct duped CER> replies. I can't understand why, but if you need duplicate mailings in some cases, then have it your way. Regards. --- ┏━━┓彡 野宮 賢 mail-to: nomiya @ lake.dti.ne.jp ┃＼／彡 ┗━━┛ "The question of who holds the platform and whether the person or organisation holding it is trustworthy has serious and profound implications in these volatile times. Once trust is broken, it is extremely difficult to restore. It is necessary to diversify in advance." -- Financial Times --