I'm trying to send email using telnet in cmd. I have connection with telnet now
C:\Users\Student>telnet alt3.gmail-smtp-in.l.google.com 25
then it brought me here:
220 mx.google.com ESMTP c8si3296343qgc.94 - gsmtp
I then type helo to make sure I'm connected which I should get a 250
ehlo 250-mx.google.com at your service, [126.96.36.199] 250 SIZE 35882577
The next command after receiving the 250 should be:
mail from: <firstname.lastname@example.org>
which brought me to
500 Syntax error, command unrecognized
I've read several sites which says that firewalls must be compliant with section 3.1.2 of RFC 2979 (Firewall Requirements) and I should make sure that the firewall is not disabling any SMTP function your server requires, such as SMTP Authentication. If my firewall has a "Proxy" for SMTP, I should remove it and then add my own that does nothing with Port 25.
So can please someone tell me how can I do that. I'm totally not aware where to find those things, or if you have alternatives please tell me so. Thanks!