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I can't find any documentation on how postfix stores email. Where is it stored, and in what format? I'm using Ubuntu server 11

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2 Answers 2

up vote 9 down vote accepted

Probably /var/mail/[username] or the more traditional /var/spool/mail/[username]

The normal format, called "mbox", uses a line that starts with "From " to indicate the start of each message - this is one reason why many email clients will change "From " in the body of the message to ">From ". You can also configure it to use "maildir", in which /var/mail/[username] is a directory in which every email message is a file in that directory.

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This is of course assuming that the user doesn't have procmail configured to do it for him instead. –  Shadur Oct 26 '11 at 5:13
    
It's also assuming that they haven't installed cyrus-sasl which moves things around. We're trying to keep things simple. –  Paul Tomblin Oct 26 '11 at 13:00

For outbound mail (you didn't specify, and inbound is answered elsewhere) it is in /var/spool/postfix. If you look there you will find all sorts of subdirectories.

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I cannot find my outbound mails inthere on my debian machine. –  simonpie May 6 '13 at 0:45
    
I cannot find my outbound mails in there on my debian machine. This directory is used but things there are store only trensiently. Alpine stores outbound emails in /home/[username]/mail/sent-mail for example. –  simonpie May 6 '13 at 0:57
    
Postfix does not store outgoing mail permanently. Once it's off the system, it's no longer the responsibility of the MTA. If you need a permanent copy, Bcc: yourself, or use whatever your MUA offers (like you mention for Alpine). –  tripleee Jun 11 at 9:09

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