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Thunderbird supports secure email connections without any additions. &nbsp;If your ISP supports it, you need to get the connection details from them. &nbsp;It is usually on a different port. &nbsp;If they don't support, you can't use it.<br />
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If you're talking about encrypting the contents instead of the connection, here's a supplier for certificates: <a href="http://www.comodo.com/support/products/email_certs/thunderbird.php" rel="ugc">http://www.comodo.com/support/products/email_certs/thunderbird.php</a>&nbsp; &nbsp;Here's an article about using PGP with Thunderbird: <a href="http://lifehacker.com/#!180878/how-to-encrypt-your-email" rel="ugc">http://lifehacker.com/#!180878/how-to-encrypt-your-email</a>
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Thunderbird supports secure email connections without any additions.  If your ISP supports it, you need to get the connection details from them.  It is usually on a different port.  If they don't support, you can't use it.

If you're talking about encrypting the contents instead of the connection, here's a supplier for certificates: http://www.comodo.com/support/products/email_certs/thunderbird.php [http://www.comodo.com/support/products/email_certs/thunderbird.php]   Here's an article about using PGP with Thunderbird: http://lifehacker.com/#!180878/how-to-encrypt-your-email [http://lifehacker.com/#!180878/how-to-encrypt-your-email]

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Thanks. &nbsp;Yes, I am asking about encrypting contents &nbsp;and making my own personal cert. &nbsp;Any freeware certs worth looking at?
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Thanks.  Yes, I am asking about encrypting contents  and making my own personal cert.  Any freeware certs worth looking at?

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You're welcome, I learned something too. &nbsp;Again.
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You're welcome, I learned something too.  Again.

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I want to encrypt my email. &nbsp;Any details appreciated. &nbsp;I am using windoze XP. &nbsp; Thanks.
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I want to encrypt my email.  Any details appreciated.  I am using windoze XP.   Thanks.

How do I make my own personal certificate to use for Thunderbird 3.19?

Thunderbird is an email, newsgroup, news feed, and chat (XMPP, IRC, Twitter) client that supports POP and IMAP and LDAP address completion. The vanilla version is not a personal information manager, although the Mozilla Lightning extension adds PIM functionality. Thunderbird can manage multiple email, newsgroup, and news feed accounts and supports multiple identities within accounts. Features such as quick search, saved search folders, advanced message filtering, message grouping, and labels help manage and find messages. Thunderbird incorporates a Bayesian spam filter, a whitelist based on the included address book, and can also understand classifications by server-based filters such as SpamAssassin. Extensions allow the addition of features.

Thunderbird

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.

Microsoft Legacy OS

Encryption is the process of encoding messages or information in such a way that only authorized parties can read it. In an encryption scheme, the intended communication information or message, referred to as plaintext, is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients, but not to unauthorized interceptors.