The reason behind blacklisting IP/domain
If you use a self-hosted system to send emails, your dedicated IP/ domain may fall into blacklists such as Spamhaus, Barracuda and Spamcop
These lists hide the reasons behind that or the way they work.
There are myths about that.
Many believe that email bounce and sending a large number of emails cause this issue.
But from my knowledge, I can tell this is not related.
I think there is one reason behind blacklisting your IP/domain. It is the spam traps.
spam traps are email addresses used as seeds. When you send many emails to them, your IP will be blacklisted.
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ProducerK -
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