OfflineIMAP/offlineimap

introduce a configuration option to define the internaldate used for APPEND

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#522 opened on Feb 6, 2018

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featuregood first issueneed contributor!

Description

Hello, I'm using Offlineimap, my mail provider is FastMail. Whenever I'm moving a file around locally (from one Maildir directory into another one) the mail is first being deleted on the server, and then uploaded again, so far so good. But when the mail is uploaded again the internaldate of the message get's changed to the current timestamp:

2018-02-06 13:28:26 DEBUG: [imap]: savemessage: date: "06-Feb-2018 13:27:33 +0100", […]

So in the end the mail shows on FastMail with the wrong date. Correct woud be the date which is set in the Date header of the mail. How can I configure Offlineimap to respect the Date header here?

Contributor guide

Tech stack
python
Domain
backend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Python basicsIMAP protocolOfflineIMAP codebase navigation
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Examine the configuration system in offlineimap, particularly the IMAP folder class. Locate the `savemessage` method (likely in `IMAPFolder.py`) where the date is set. Look into how the Date header is parsed from the email. Introduce a new configuration option (e.g., 'use date header as internaldate') and modify the APPEND command to use the parsed date. Ensure backward compatibility. Reference the documentation on how other options are defined.