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Having SPF, DKIM, DMARC but my campaigns are marked as spam : "too many recipients"?


#1

Hello,

I have a static IP address for my server, which is not listed in spam databases and it does not have poor reputation.
I have correctly configured SPF, DKIM & DMARC (all tests marked “pass” in Gmail for instance).
My domain has a correct reverse DNS/PTR.
BUT my emails are rejected by one important provider : Skynet.be. Every message I send to a "...@skynet.be" address gives me the following error message :

SMTP error from remote mail server after RCPT TO:address@skynet.be: 459 Too many recipients (RL)

What should I do, what should I try, what can I do in order to make my messages reach their ...@skynet.be target ?

Thank you for your advices,

Best regards,

T.