ปัญหาการส่งอีเมล

An email blacklist is a list of IP addresses or domains that some email providers consider to be untrustworthy and may send malicious emails such as spam or phishing. When the email server receives emails from IPs or domains that are in the email server's blacklist, the destination may refuse to receive the email and send it back to you. The originating email server or the email may be placed in the recipient's spam folder.