Email Bounce Back Messages

The domain or email address is blacklisted or detected as spam.

• Review if the IP address is listed on the Spamhaus IP and Domain Reputation Checker.

The recipient is detected as spam, blacklisted, or has reached their email quota.

• Contact the sender and check the reason for the email rejection.
• Request your email address or domain to be whitelisted on the recipient's server.

• Attempt to send the email at a later time. 

• Contact the sender and check the reason for the email rejection.
• Request your email address or domain to be whitelisted on the recipient's server
• Also, request to check with the recipient if your email address or domain is in their server's spam filter.
• Attempt to send the email at a later time. 

• The recipient has blocked your domain name or email address.
• Request your email address or domain to be whitelisted on the recipient's server

• Check DNS records configuration. Possibly the DKIM or SPF record is not allowing incoming messages. Ensure all DNS records are updated.
• Contact the sender and check the reason for the email rejection.
• Request your email address or domain to be whitelisted on the recipient's server
• Attempt to send them at a later time.

• Check DNS records configuration. Possibly the DKIM or SPF record is not allowing incoming messages. Ensure all DNS records are updated.
• Contact the sender and check the reason for the email rejection.
• Request your email address or domain to be whitelisted on the recipient's server
• Attempt to send them at a later time.

• Check DNS records configuration. Possibly the DKIM or SPF record is not allowing incoming messages. Ensure all DNS records are updated.
• Contact the sender and check the reason for the email rejection.
• Request your email address or domain to be whitelisted on the recipient's server
• Attempt to send them at a later time.

• Check DNS records configuration. Possibly the DKIM or SPF record is not allowing incoming messages. Ensure all DNS records are updated.
• Contact the sender and check the reason for the email rejection.
• Request your email address or domain to be whitelisted on the recipient's server
• Attempt to send them at a later time.

• Confirm the email address with the cx and ask to verify the spelling of it.
• Attempt to send them at a later time

• Check DNS records configuration. Possibly the DKIM or SPF record is not allowing incoming messages. Ensure all DNS records are updated.
• Contact the sender and check the reason for the email rejection.
• Request your email address or domain to be whitelisted on the recipient's server
• Attempt to send them at a later time.

• Check if the email address is correct.
• Suggest he attempts to send them at a later time.

Error 550
You have reached the maximum number of messages per session.

• Attempt to send them at a later time.

Error 550
The Domain Name System (DNS) reported that the recipient's domain does not exist.

• The recipient's domain or email address does not exist.
• The recipient's MX record is not set up.
• The recipient's A record for the mail server is not set up.

• Check DNS records configuration. Possibly the DKIM or SPF record is not allowing incoming messages. Ensure all DNS records are updated.
• Contact the sender and check the reason for the email rejection.
• Request your email address or domain to be whitelisted on the recipient's server
• Attempt to send them at a later time.

UCE
(Unsolicited Commercial email ) strictly prohibited

The recipient is sending unsolicited emails to any person or persons the sender does not know or have prior explicit consent to send the message(s) to.

• Suggest the use of email marketing tools such as Constant Contact.

SMTP Temporary rejection - The server couldn't identify the domain's PTR record.

• Check if the Sender's IP Address has set up a reverse DNS before sending the email. 

SMTP 552
(Remote MTA $ip: A URL contained in this message is blacklisted by Spamhaus DBL. See http://www.spamhaus.org/dbl)

There is a blacklisted  URL in the body of the email.

• Remove the blacklisted URL and send it again. 

SMTP 552
(virus-infected message rejected)

A virus in the message has been detected by Cloudmark

• Set an opt-out option in your email.
• Ensure that all email recipients are correct.
• Contact HostGator Support if your emails are flagged erroneously.

SMTP 552
(virus-infected message rejected)

The email contains a file that is in a format not allowed by the server like: bat .btm .cmd .com .cpl .dll .exe .lnk .msi .pif .prf .reg .scr .vbs.

• Set an opt-out option in your email.
• Ensure that all email recipients are correct.
• Contact HostGator Support if your emails are flagged erroneously.

SMTP 554
(Connection refused - IP)

The message is tagged as spam based on CSI.

• Check the sender's IP address's reputation in Cloudmark Sender Intelligence (CSI).

SMTP 554
(Connection Rejected. Reverse DNS for IP does not exist)

Permanent rejection. The domain doesn't have a PTR record.

• The incoming mail server has detected that the email is spam or the sender's IP address is blacklisted.

SMTP 421
(Server Temporarily Not Available)

The email queue is full.

• Attempt to send the email at a later time.

The email limit has been exceeded.

• Attempt to send the email at a later time.

• Attempt to send the email at a later time.

• Ensure that you entered the correct email address. 

• Contact the email recipient. Your email address could have been blacklisted by accident. 

• Check if the email address is misspelled.