On 2023-07-31 at 09:34:47 UTC-0400 (Mon, 31 Jul 2023 15:34:47 +0200)
Fourhundred Thecat via Postfix-users <400the...@gmx.ch>
is rumored to have said:

On 2023-07-31 15:09, Bill Cole via Postfix-users wrote:
On 2023-07-31 at 02:43:28 UTC-0400 (Mon, 31 Jul 2023 08:43:28 +0200)

    1690633510.M94611123819.mail,S=11706,W=12202:2,S

That message was delivered at Sat Jul 29 12:25:10 2023 UTC. It is 11706 bytes on disk and the "RFC822Size" (a.k.a. "wire size") is 12202 bytes, implying that it has 496 lines of text. It has been marked as seen by an IMAP client, and has no other IMAP flags set. The delivery agent believes that its hostname is simply "mail".

how did you decode it ?

1690633510 is the timestamp in "Unix Epoch Seconds." "date -j -f %s 1690633510" will do the conversion.

M94611123819 is a locally unique token chosen by the delivery agent. I believe that for Dovecot on most platforms there's an inode number hidden in there.

mail is the hostname

S= and W= fields are (compatible) Dovecot extensions to the naming format that spares reading the file or even stat()ing it to get the raw size.

: is the delimiter between the base name and the flags

2 is the version number for the format.

S is an indicator that the IMAP "\Seen" flag is set for the message.




--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
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