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John Smith
John Smith

Reputation: 4343

Trying to connect to Gmail's SMTP

I'm trying to connect to Gmail's SMTP.

First, I get its smtp server.

dig mx gmail.com

gmail-smtp-in.l.google.com is the one with the lowest priority.

I think I could try telnet'ing to that address at this point, however Gmail requires TLS, and telnet does not support it.

I try openssl then, for ports 25, 587 and 465:

openssl s_client -starttls smtp -connect gmail-smtp-in.l.google.com:587

The command above returns nothing... why?

However, this one does connect:

openssl s_client -starttls smtp -connect smtp.gmail.com:587

Why?

Upvotes: 0

Views: 362

Answers (1)

Yehor Smoliakov
Yehor Smoliakov

Reputation: 354

The server of gmail-smtp-in.l.google.com is not accessible on 587 port, but it is on 25.

Upvotes: 1

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