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Ruby script to upload or convert a Maildir Inbox to an IMAP server

Published: 01-01-2013 | Author: Thibaut Colar | Text only version of this article

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Note: The original page is often offline, so therefore the script is mirroredhere. Credits to the original author: script to uploadconvert a maildir inbox to an imap_server

I decided to change email server for several reasons, anyway, long story short Iwas using postfix(qmail before that) and decided to switch to citadel, which ismuch easier to deal with (simple config).

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Anyway, Citadel use it's own format for emails (Berkeley DB), so you can't justcopy over the existing emails stored in Maildir format (8 years worth !), butsince Citadel provides an IMAP server, all I need is a tool that can copy/uploadThe IMAP folder(s) content to an IMAP server.

I thought that would already exist, easy to find, but did not seem to find one.I found one made in PERL, but as usual Perl / CPAN failed me completely :(

I found another one that was really bare bone but usable here:

It's quite compact and easy to use, tanks to ruby, but it was kinda hard codedto copy just the Inbox folder ... in my case I had many subfolders (Sent,archives and so on) that I wanted to copy as well, so I modified it a little tomake it "parameterizable", so i could run it against other sub folders of mychoice.


Example: Copy the Inbox

ruby MaildirToImap.rb /home/tcolar/Maildir/cur/ INBOX

Example: Copy an Inbox sub-folder (ex: 'Sent')

ruby MaildirToImap.rb /home/tcolar/Maildir/.Sent/cur/ INBOX/Sent

Repeat for all the sub-folders you want to copy.

It takes about 0.5 seconds per email (on a local server), so if you have manyemails it can take a while.

The script:

# Thibaut Colar# "Upload" a local Maildir folder onto an IMAP server# Inspired by: WARNING: Come with no warranties of any kind whatsoever, use at your own risk !## Use, Example: ruby MaildirToImap.rb /home/tcolar/Maildir/cur INBOX# Example(sub-box): ruby MaildirToImap.rb /home/tcolar/Maildir/.Sent/cur/ INBOX/Sent#vars - set accordinglyIMAP_HOST = 'localhost'IMAP_USER = 'me'IMAP_PASS = 'my_password'TEST_MODE = 0 # Set to 0 to actually do it# programrequire 'net/imap'def upload_dir(imap, mail_dir, imap_dir)        imap.examine(imap_dir)        msgs = Dir.entries(mail_dir).each do |f|        if ! then                print "Will add ", mail_dir, f, "t to: ", imap_dir, "n"                if TEST_MODE == 0 then                        imap.append(imap_dir,,[:Seen])                end        end        endend# Mainif ARGV.length < 2 then        print "Expecting 2 params: - maildir directory (usually ends with /cur) - IMAP dirn"        exitendmail_dir=ARGV[0]imap_dir=ARGV[1]imap ='LOGIN', IMAP_USER, IMAP_PASS)begin        imap.create(imap_dir)rescue        print "Failed creating: ", imap_dir, ", that's probably OKn"endupload_dir(imap, mail_dir, imap_dir)
Tags: email, imap, nopriv, ruby, software