Migrating From Eudora POP
To Thunderbird IMAP
Before beginning the migration process to convert Eudora to Thunderbird, there are
some steps you should take and some information you should consider in order to make
the transition process smoother.
It is important to note that this process does not make any changes to your current
Eudora setup, no files are deleted or altered. When you first start up Thunderbird it will
detect any existing mail clients and will ask if you want to import your mail from them so it
is important follow these steps prior opening Thunderbird.
Managing Your Mailboxes
Please allow some time to do some house keeping on your mailboxes. Clean up your
mailboxes, doing the clean up now will speed up the import process later:-
• Delete any unwanted messages.
• Organise your mailboxes now. Large mailboxes (more than 1000 messages)
can take a long time to import.
• Compact the mailboxes once you have deleted unwanted messages. The
compact mailbox option is located under Special > Compact mailboxes.
• Mailboxes and folders with non-standard characters in Windows will not
import and should be renamed first. Avoid long names and any punctuation
other than a dash or an underscore.
Please ensure you have enough disk space to import all your
mailboxes. If you are using Staff WTS Thunderbird will be
installed on your N drive. If you are using Cluster WTS then
Thunderbird is installed on the R drive. As rule of thumb
ensure you have at least as much free space on your R or
N drive as is currently occupied by your Eudora mailboxes
and attachments located on R:\dos\eudora. The quota
program located on Start > Programs > Software P-R >
Quota usage should tell you how much free space you have.
• If you have a large amount of mailboxes and large attachments the import wizard
can take a long time to migrate everything. Thunderbird keeps the attachment as
part of the mail file, whereas Eudora downloads and stores attachments as
separate files in a ‘attach’ folder. When importing from Eudora, Thunderbird
attempts to join the attachment back to the e-mail it came with. This can take
quite a long time if there are a large number of attachments.
• Messages will not retain the attributes status (e.g. read unread etc) labels and
• Thunderbird will NOT import any attachments referenced from Eudora Out
mailbox. Eudora normally references a file location when any attachments are
sent out and this location is lost when you import the Out mailbox into
Thunderbird. Information systems have tested a number of import tools but have
not been able to find a workaround for this problem.
Beginning the Import Process
Thunderbird on Staff WTS and Cluster WTS is located under Start > Programs >
Internet Applications > Thunderbird.
When you access Thunderbird for the very first time you will be prompted with the
account set up wizard. If you DO NOT see the flash screens below then you have
accessed Thunderbird previously and the application will open automatically
You are given two choices option 1 and option 2. It is important to know the differences
between these two options as this will dictate what is imported:-
OPTION 1 - This will only import all your IMAP mailboxes into a Thunderbird account. It
will NOT import your Eudora Settings such as address book and Eudora local mailboxes.
OPTION 2 –Use this option to import your email settings from another email client (e.g.
Eudora). If Eudora is configured to POP it will import all your POP mailboxes, your POP
settings and address book. If Eudora is configured to IMAP it will import all your local
mailboxes, in addition your IMAP mailboxes, your IMAP settings and your address book.
If you are migrating from Eudora POP to Thunderbird IMAP we advise to select
OPTION 1 to configure Thunderbird to IMAP then import your Eudora mailboxes.
OPTION 1 Setup Thunderbird Account Using IMAP
1. Select option 1 to begin the import process.
(i) (ii) (iii)
2. Type in your name in first box (i) then username is second box (ii). Click ok to
create the account, Thunderbird will open automatically.
3. Once you have configured Thunderbird to IMAP you will need to import your
Eudora POP mailboxes. To import your Eudora POP mailboxes go into Tools >
4. Select ‘Mail’ from box (i) and click next. In the second box (ii) select ‘Eudora’
and click next.
5. Please be patient during the import process (i). If you have a large number of
mailboxes with large attachments this process can take some time. Once
complete check the summary of mailboxes imported and click finish (ii).
6. The imported mailboxes will be listed under the local folders in a folder called
Eudora mail . These are your archive POP mailboxes from Eudora. Any new
messages will come into the IMAP <account name> Inbox, as Thunderbird will be
configured with IMAP. If you have used IMAP before (possibly with webmail) your
mailboxes will be listed under the IMAP <account name>. If you wish to view any
imported Eudora mailbox within IMAP you need to drag and drop the mailboxes
into the IMAP < account name>, then you will be able to view the mailboxes
To drag and drop click on the mailbox you
wish to move so it is selected. Hold down left
button on mouse and move the mailbox
into the IMAP <account name>.
7. Check the mailbox has been imported ok and drag and drop the rest of the
mailboxes into the IMAP <account name> one at a time.
8. If you have a top level folder with subfolders Thunderbird will not allow you to
drag and drop the top level folder. You will need to manually create the top level
9. Right click on the IMAP <account name > and select New Folder (i). Give the
folder a name and add a slash on the end to represent a folder (ii) , click ok.
10. The new top level folder will be represented with grey italics in your folder list
under your IMAP <account name >.
11. Now you should be able drag and drop the sub folders into the top level
folder.You will need to do the above procedure for all top level folders.
12. Once all your imported mailboxes are moved to your IMAP <account name> you
will have duplicate set of mailboxes. If you are happy with your maiboxes, you
can delete the ‘Eudora Mail’ folder which will remove the duplicate set of
mailboxes under local folder.
13. If you wish to import your Eudora address book go to Tools > Import.
14 . Select address book from (i) and Eudora from (ii). After it has finished the
import process click finish.
You should now have Thunderbird successfully configured to IMAP and copied your POP
mailboxes from Eudora into your IMAP account.
Post Migration Issues
• After importing mail from Eudora, you may find that some messages contain html
tags, in angle brackets (e.g. <x-flowed>). If this poses a major problem please
contact IS Helpdesk for assistance.
• Please check if your address book has imported all your entries correctly. You
may find that you have duplicate entries. When Thunderbird imports a mailing list,
it also imports the email addresses in the mailing list as individual entries.
• The import wizard will not import any labels, status and priority.
• Directory searches are performed a little differently so results may not match
exactly. For example the LDAP server will not list extention numbers and can be
sluggish at times.
• Thunderbird uses “accounts” where Eudora uses “personalities”. The left hand
pane shows the account names.
Once you have successfully migrated all your mail and address book you will need
to consider customising Thunderbird and setting up some mail preferences. For
example you may wish to consider the following :-
• Setting up signatures
• Configuring where your sent items are stored
• Configuring the directory services ( LDAP )
• Creating filters
For general instructions on how to set the above features up please see the following
If you have any other issues using Thunderbird you can contact firstname.lastname@example.org or
call internally ex37779 externally 0207 679 7779.