Anyone know what this means? I got this after sending an email to an account on mail4 this morning
(reason: 552 sorry, your envelope sender domain must exist (#5.7.1))
the sender domain must be a valid.
Anyone know what this means? I got this after sending an email to an account on mail4 this morning
(reason: 552 sorry, your envelope sender domain must exist (#5.7.1))
the sender domain must be a valid.