> You said in your message "lack of MX record", not "nullMX".
Read the entire thread? >> postfix/smtp[53472]: 47yz7m5Jj2zg4gL: to=<kr...@hotmal.com>, relay=none, >> delay=0.29, delays=0.06/0/0.22/0, dsn=5.1.0, status=bounced (Domain >> hotmal.com does not accept mail (nullMX))