helo
250 mail.ssy.local Hello [189.151.35.251]
mail from:[email protected]
250 2.1.0 Sender OK
RCPT to:[email protected]
250 2.1.5 Recipient OK
DATA
354 Start mail input; end with <CRLF>.<CRLF>
you need dot (.) only in a line followed by RETURN
C’250 2.6.0 <0924b2e4-dad3-4938-9d54-fdd9deeec289> Queued mail for delivery