tools / Email

SMTP submission test

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

Result connectedProtocol implicit TLSTLS yesTime 169 ms

220 smtp.gmail.com ESMTP 6a1803df08f44-91ca7f254a1sm9939236d6.7 - 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

ms		Line
0	·	Connecting to smtp.gmail.com:465 with implicit TLS
47	·	Connected, TLS handshake done
108	←	`220 smtp.gmail.com ESMTP 6a1803df08f44-91ca7f254a1sm9939236d6.7 - gsmtp`
108	→	`EHLO tools.mikepage.nl`
139	←	`250-smtp.gmail.com at your service, [2a09:bac1:76e1:53d8::412:14]`
139	←	`250-SIZE 35882577`
139	←	`250-8BITMIME`
139	←	`250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH`
139	←	`250-ENHANCEDSTATUSCODES`
139	←	`250-PIPELINING`
139	←	`250-CHUNKING`
139	←	`250 SMTPUTF8`
139	→	`QUIT`
169	←	`221 2.0.0 closing connection 6a1803df08f44-91ca7f254a1sm9939236d6.7 - gsmtp`

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