how can I get the certificate for STARTTLS/IMAP connections?

[Tomasz Chmielewski]

Hello,

openssl let's me retrieve the SSL certificate for imaps (SSL-backed IMAP
on port 995) with the following command:


openssl s_client -connect example.com:995


Is it possible to do something similar for STARTTLS, connecting to IMAP
on port 143?

Perhaps not with openssl, or not only with openssl - does anyone know
how to do the above from command line?

[Jeffrey Walton]

openssl let's me retrieve the SSL certificate for imaps (SSL-backed IMAP on
openssl s_client -connect example.com:995
Is it possible to do something similar for STARTTLS, connecting to IMAP on
port 143?

Take a look at the `-starttls` option for s_client(1) at
https://www.openssl.org/docs/apps/s_client.html.

Jeff
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[Kyle Hamilton]

Post by Tomasz Chmielewski
Hello,
openssl let's me retrieve the SSL certificate for imaps (SSL-backed
openssl s_client -connect example.com:995
Is it possible to do something similar for STARTTLS, connecting to
IMAP on port 143?
Perhaps not with openssl, or not only with openssl - does anyone know
how to do the above from command line?

On 1.0.1:

openssl s_client -starttls imap -connect example.com:143

-Kyle H