Now to send encrypted mails with a script or mail command

robertjinx · 03-06-2009, 08:44 AM

Hello, Im trying to send monthly mails with the new root password to 2 mails of mine. Now reseting and sending the mail is done, its easy and with no issue, but how to send the mail more secure, encrypted or thru TLS or something.

How to tell the mail app or mail command to use TLS or to encrypt the mail?!

Please let me know if you have some ideas.

Thanks!

anomie · 03-06-2009, 09:45 AM

One option is to gpg encrypt an ascii text file containing the sensitive data. Then send that encrypted file as an attachment. Example:

Code:

$ gpg --encrypt --armor -r <key_userid> <sensitive_file>

mesiol · 03-06-2009, 09:47 AM

Hi,

this can be done easy in a script. Write the mail body to a file, encrypt the file using gpg and send the file via mail to recipient.

robertjinx · 03-06-2009, 12:55 PM

Hi, the idea works and is quite good, but when I do the encryption, gpg asks me if I'm sure, something like this:

gpg: 487B0AFD: There is no assurance this key belongs to the named user
Use this key anyway? (y/N).

How can I tell gpg to do it automatic without asking or just to remove the question and just do it?

mesiol · 03-06-2009, 01:08 PM

Hi,

sign the key with

Code:

 gpg --sign-key KEYNAME

but be sure doing this, it will create a trust chain, so this means you should be sure the key belongs to the person named in the key. After that you should be no longer bothered with this question.