is there any why to use DKIM authentification with telnet smtp connection using these commands : Ehlo Mail From Rcpt-To Data QUIT
Let's say that i have already the private and public key generated:
The private key stored in a file in my server and the public key is propagated with my domain DNS.
How i can tell to SMTP remote server (eg gmail or hotmail..) that i want to use DKIM using telnet only?