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I would like to make them store data in a encrypted location.

I am also interested in Thunderbird, postbox etc...

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up vote 8 down vote accepted stores messages as .emlx files in ~/Library/Mail/TYPE-ACCOUNT/ eg. ~/Library/Mail/


Thunderbird stores it's data in ~/Library/Thunderbird/Profiles/[string].default/. There are two folders, one called Mail that will hold the Local Folders and if you have an IMAP account a folder called ImapMail that will hold the IMAP messages if downloaded. The [string] is a random alphanumeric string.


Postbox which is based off of Thunderbird stores it in much the same manner but at ~/Library/Application Support/Postbox/[string].default/.


GyazMail stores it's data in ~/Library/Application Support/GyazMail (data)/


MailSmith stores it's data in ~/Documents/Mailsmith User Data/

To store you email in an encrypted location you can make an alias (ln -s ORIGINAL DESTINATION - eg. ln -s ~/Library/Mail /Volumes/EncrypedImage/) onto an encrypted disk image made using Disk Utility if you'd like. Just ensure that the disk image is available or you'll find the data is being stored in a folder at /Volumes/EncryptedImage instead of actually on the image.

Alternatively you could use FileVault that will encrypt your entire home folder. However if the messages are sitting on a server somewhere (eg. not removed by a POP account or using an IMAP account) then the messages are still available unencrypted on the mail server.

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It's in ~/Library/Mail.

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Wow awesome answer. Yes I am thinking FileVault in future, but space is a bit tight so I can't turn it on right now (as it needs space to do its work). Am also concerned over performance quirks with FileVault... – Michael Neale May 27 '09 at 6:49

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