01-01-2013 | Thibaut Colar | Text only version of this article
Note: The original page is often offline, so therefore the script is mirrored here. Credits to the original author: wiki.colar.net/rubyscripttouploadconvertamaildirinboxtoanimap_server
I decided to change email server for several reasons, anyway, long story short I was using postfix(qmail before that) and decided to switch to citadel, which is much easier to deal with (simple config).
Anyway, Citadel use it's own format for emails (Berkeley DB), so you can't just copy over the existing emails stored in Maildir format (8 years worth !), but since Citadel provides an IMAP server, all I need is a tool that can copy/upload The 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: http://www.robsayers.com/computing/MaildirToImap.html
It's quite compact and easy to use, tanks to ruby, but it was kinda hard coded to 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 to make it "parameterizable", so i could run it against other sub folders of my choice.
apt-get install ruby)
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 many emails it can take a while.
# Thibaut Colar # http://wiki.colar.net/ # "Upload" a local Maildir folder onto an IMAP server # Inspired by: http://www.robsayers.com/computing/MaildirToImap.html # 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 accordingly IMAP_HOST = 'localhost' IMAP_USER = 'me' IMAP_PASS = 'my_password' TEST_MODE = 0 # Set to 0 to actually do it # program require 'net/imap' def upload_dir(imap, mail_dir, imap_dir) imap.examine(imap_dir) msgs = Dir.entries(mail_dir).each do |f| if !File.directory?(f) then print "Will add ", mail_dir, f, "t to: ", imap_dir, "n" if TEST_MODE == 0 then imap.append(imap_dir,File.open(mail_dir+f).read,[:Seen]) end end end end # Main if ARGV.length < 2 then print "Expecting 2 params: - maildir directory (usually ends with /cur) - IMAP dirn" exit end mail_dir=ARGV imap_dir=ARGV imap = Net::IMAP.new(IMAP_HOST) imap.authenticate('LOGIN', IMAP_USER, IMAP_PASS) begin imap.create(imap_dir) rescue print "Failed creating: ", imap_dir, ", that's probably OKn" end upload_dir(imap, mail_dir, imap_dir)