Charlie Brady <[EMAIL PROTECTED]> schrieb:
> I don't understand how the mail client is getting the "internal date"
> (which is no longer "internal" once it is exported from the IMAP daemon
> environment). There's obviously something that I don't understand. Is
> there part of the IMAP protocol which sends this "internal" concept of
> date to the client?
Yes. The client can use the FETCH command, which can deliver almost
everything :-) See RFC2060, Page 41
Example:
The FETCH COMMAND send from client to the IMAP server:
aw5 FETCH 81,80 (FLAGS RFC822.SIZE INTERNALDATE BODY.PEEK[HEADER.FIELDS
(SUBJECT FROM TO MESSAGE-ID REFERENCES IN-REPLY-TO DELIVERY-DATE DATE)])
Response the IMAP server send to the client: note the INTERNALDATE!
* 81 FETCH (FLAGS (\Seen) RFC822.SIZE 81155 INTERNALDATE "21-Feb-2002
21:59:10 +0100" BODY[HEADER.FIELDS ("SUBJECT" "FROM" "TO" "MESSAGE-ID"
"REFERENCES" "IN-REPLY-TO" "DELIVERY-DATE" "DATE")] {412}
Delivery-date: Thu, 21 Feb 2002 21:58:28 +0100
Date: Thu, 21 Feb 2002 15:58:08 -0500 (EST)
From: Charlie Brady <[EMAIL PROTECTED]>
To: Michael Weinberger <[EMAIL PROTECTED]>
Subject: Re: [e-smith-devinfo] Courier IMAP Howto available
In-Reply-To:
<[EMAIL PROTECTED]>
Message-ID:
<[EMAIL PROTECTED]>
)
* 80 FETCH (FLAGS (\Seen) RFC822.SIZE 4185 INTERNALDATE "21-Feb-2002
21:41:04 +0100" BODY[HEADER.FIELDS ("SUBJECT" "FROM" "TO" "MESSAGE-ID"
"REFERENCES" "IN-REPLY-TO" "DELIVERY-DATE" "DATE")] {379}
Delivery-date: Thu, 21 Feb 2002 21:40:40 +0100
Date: Thu, 21 Feb 2002 15:40:17 -0500 (EST)
From: Charlie Brady <[EMAIL PROTECTED]>
To: Michael Weinberger <[EMAIL PROTECTED]>
Subject: Re: [e-smith-devinfo] Courier IMAP Howto available
In-Reply-To: <[EMAIL PROTECTED]>
Message-ID:
<[EMAIL PROTECTED]>
)
> If messages are stored in mbx or mbox format, there is no file time stamp
> per message, so wu-imapd must be using something else. If it's something
> as sane as "time of last Received header", then I don't see why the
> maildir patched wu-imapd couldn't do the same thing. Except perhaps that
> it would be an efficiency thing, in that each message would need to be
> opened to extract the headers. That's not such an issue with a "one big
> file containing all messages" format, as that needs to be scanned in any
> case.
Mails in plain mbox format are delimited by a blank line followed by a "From
" line. This line contains the internal date. e.g.
>From [EMAIL PROTECTED] Sun Apr 1
20:35:12 2001
Mails stored in as individual files in a maildir directory dont have this
first line.
Michael
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