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I am running a Postfix server and I would like to know the meaning of suffixes that mail filenames have. For instance:

1338839258.Vfe02I2a6f0M572204.example.com:2,S
1338840057.Vfe02I2a6f1M483134.example.com:2,S
...

And also, what's the criteria to assign them? I've been searching information on this topic, but I have only found references to procmail mechanisms.

HopelessN00b
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elitalon
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1 Answers1

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The 2 indicates that each character following the comma is a flag.

The S flag means "seen" (i.e. the message has been read).

http://cr.yp.to/proto/maildir.html

Kevin DeGraaf
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    To clarify: this is ***NOT*** a `procmail` (or even `Postfix`) specific thing: It is part of the [`maildir` inbox format, and is supported by a number of MTAs and MDAs (and even used by a few MUAs apparently)](http://en.wikipedia.org/wiki/Maildir) – voretaq7 Oct 05 '12 at 21:17
  • I know that (hence the link to the Maildir spec). The OP didn't. – Kevin DeGraaf Oct 05 '12 at 21:21
  • I know you know that Kevin (because you linked to the spec), I also know the OP didn't (because they asked the question) and don't want them wandering around with a mistaken impression should the link to the spec not be a good enough hint :) – voretaq7 Oct 05 '12 at 21:25
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    Fair enough. In the future, I'll explain to OPs: "This isn't a `foo` issue, it's a `bar` issue, and here's the answer and the `bar` specification." :-) – Kevin DeGraaf Oct 05 '12 at 21:31
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    Thanks for this clarifying discussion ^_^ IMHO the first comment should've been made to my post, not the answer. – elitalon Oct 06 '12 at 16:01