@SophosSupport https://t.co/Fnfhu9BUkH.194.206.27 failed after I sent the message. STARTTLS proto=TLSv1.2; cipher=ECDHE-ECDSA-AES128-GCM-SHA256.
Remote host said: 550-5.7.1 [208.70.208.139 12] Our system has detected that this message is
550-5.7.1 likely unsolicited mail.