tools / Email

SMTP submission test

Connect to a mail server's submission port and check its banner, STARTTLS and login options.

Result connectedProtocol STARTTLSTLS yesTime 309 ms

220 smtp.gmail.com ESMTP d75a77b69052e-54313234047sm8245591cf.28 - gsmtp

Capability	Meaning
`SIZE 35882577`	maximum message size 34 MB
`8BITMIME`	8-bit message bodies
`AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH`	login mechanisms
`ENHANCEDSTATUSCODES`	detailed status codes
`PIPELINING`	send commands in batches
`CHUNKING`	BDAT transfers
`SMTPUTF8`	UTF-8 addresses

SIZE 35882577 · 8BITMIME · STARTTLS · ENHANCEDSTATUSCODES · PIPELINING · CHUNKING · SMTPUTF8

ms		Line
0	·	Connecting to smtp.gmail.com:587
21	·	Connected
124	←	`220 smtp.gmail.com ESMTP d75a77b69052e-54313234047sm8245591cf.28 - gsmtp`
124	→	`EHLO tools.mikepage.nl`
161	←	`250-smtp.gmail.com at your service, [2a09:bac1:76e1:53d8::412:14]`
161	←	`250-SIZE 35882577`
161	←	`250-8BITMIME`
161	←	`250-STARTTLS`
161	←	`250-ENHANCEDSTATUSCODES`
161	←	`250-PIPELINING`
161	←	`250-CHUNKING`
161	←	`250 SMTPUTF8`
161	→	`STARTTLS`
195	←	`220 2.0.0 Ready to start TLS`
195	·	Upgrading to TLS
195	·	TLS handshake done
195	→	`EHLO tools.mikepage.nl`
275	←	`250-smtp.gmail.com at your service, [2a09:bac1:76e1:53d8::412:14]`
275	←	`250-SIZE 35882577`
275	←	`250-8BITMIME`
275	←	`250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH`
275	←	`250-ENHANCEDSTATUSCODES`
275	←	`250-PIPELINING`
275	←	`250-CHUNKING`
275	←	`250 SMTPUTF8`
275	→	`QUIT`
309	←	`221 2.0.0 closing connection d75a77b69052e-54313234047sm8245591cf.28 - gsmtp`

Runs over a raw TCP socket from the Worker. Workers cannot open port 25, so this tests submission, not relay.