Some mailing lists reject digitally signed messages because the signature is treated as an attachment.

If you donвЂ™t have a certificate for every recipient, click the encrypted icon in your message an open lock replaces the closed lock, indicating the message will be sent unencrypted. Move the pointer over the From field, click the pop-up menu that appears, then choose the account for which you have a personal certificate in your keychain.ДЄ signed icon (containing a checkmark) is shown in the message header and indicates your message will be signed when you send it.ДЄn encrypted icon (containing a closed lock) is shown if your keychain contains a personal certificate for every recipient. In the Mail app on your Mac, choose FileВ > New Message. To send encrypted messages, the recipientвЂ™s certificate must be in your keychain. What using Mozilla Thunderbird with the Enigmail add-on gives you is an easy way to encrypt the body of your email. For similar reasons, PGP does not encrypt the subject line of your emails so you may want to use a generic subject line when sending encrypted emails. To send signed messages, you must have a personal certificate in your keychain. Encrypting the sender and receiver information would break email. Move the pointer over the From field, click the pop-up menu that appears, then choose the account for which you have a personal certificate in your keychain. In the Mail app on your Mac, choose File > New Message.

Use information found in Mail in other appsДЄ digitally signed message lets your recipients verify your identity as the sender an encrypted message offers an even higher level of security. To send encrypted messages, the recipientвЂ™s certificate must be in your keychain.

View, save, or delete email attachments To send encrypted messages, the recipientвЂ™s certificate must be in your keychain.Temporarily stop using an email account.

Encrypt email attachment for mac