Mine
public text v1 · immutable Out: 220 mail.example.com ESMTP Postfix (2.5.0)
In: EHLO unix18.sihope.com
Out: 250-mail.example.com
Out: 250-PIPELINING
Out: 250-SIZE 20480000
Out: 250-ETRN
Out: 250-STARTTLS
Out: 250-AUTH PLAIN LOGIN
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In: STARTTLS
Out: 220 2.0.0 Ready to start TLS
In: EHLO unix18.sihope.com
Out: 250-mail.example.com
Out: 250-PIPELINING
Out: 250-SIZE 20480000
Out: 250-ETRN
Out: 250-AUTH PLAIN LOGIN
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In: MAIL From:<calls@example2.com> SIZE=1565
Out: 250 2.1.0 Ok
In: RCPT To:<KELLI@EXAMPLE.COM>
Out: 451 4.3.0 <KELLI@EXAMPLE.COM>: Temporary lookup failure
In: RCPT To:<MARC@EXAMPLE.COM>
Out: 451 4.3.0 <MARC@EXAMPLE.COM>: Temporary lookup failure
In: DATA
Out: 554 5.5.1 Error: no valid recipients
In: RSET
Out: 250 2.0.0 Ok
In: QUIT