– Mail sent from a website (via contact form / script) using SMTP settings or PHP Mail will successfully send.
– Mail that is responded to via an email client bounces "Unroutable address".
– email sent from website that is configured to send submission to: firstname.lastname@example.org
-> I go onto the website and submit contact form. Mail successfully delivers.
-> I go into my email client and send a message to the same email address (utilizing my ISP SMTP server) and the mail is bounced. The message I get back indicates that it was unroutable.
I can’t figure this one out and would greatly appreciate some help debuging it please.