Blacklisted on

Hello, since this morning our emails bounce back. we can still receive emails but cannot send. here is the error message
host []
SMTP error from remote mail server after end of data:
550 A URL in this email (attribution . com) is listed on Please resolve and retry

What do we need to do to get this fixed, ?
thanks in advance for your help

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Your domain doesn’t appear to be on any MX blacklists. Based on the URL that was given in the response you can apply for 7-day delisting of your domain. There are also more steps to take on the webpage.

ok, so this has nothing to do with IP address?

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That IP address is your hosting provider, not Cloudflare. So if it is IP related, not something you could fix on :logo:

It was blocked because of a URL contained within the e-mail itself. A domain (i.e. “”) in that URL is blacklisted by them.

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