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by cpncrunch 3068 days ago
With gmail you can at least request that they unblock you, and they will do that. With live.com and icloud.com you have to spend inordinate amounts of time bouncing between useless support people before you get anywhere. gmail in general seems to have the best spam filter (lowest false positives and negatives).
2 comments
clan 3067 days ago
In my experience live.com was an easy fix.

But gmail was not. Even as a business user with support.

Gmail rejects me as an ugly spammer at the gate when using IPv6 but not when using IPv4.

My IP addresses are not listed in any public blacklists.

And the Borg hivemind is not able to tell me why. Gmail support is friendly but have no knowledge of their filter nor an escalation path.

The amusing part is they reject me as a bulk sender. But when I register into their bulk mailer program my volume is too low.

This is with strict SPF, DKIM, DMARC and registered with dnswl.org.

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cpncrunch 3067 days ago
Did you fill in the delivery problem form?

https://support.google.com/mail/contact/msgdelivery?vid=0-35...

I had a problem with ipv6 myself with gmail, but the problem was that I just didn't have ipv6 fully set up on my server, so either SPF or reverse DNS wasn't working or something like that. I think I just configured sendmail to only use ipv4 and that solved the gmail issue.

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saltybytes 3067 days ago
"I think I just configured sendmail to only use ipv4 and that solved the gmail issue."

This was my experience, too. I took this advice [1] configuring postfix and Gmail started to accept my emails.

[1] https://christian.skala.me/blog/gmail-why-are-you-doing-this...

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cpncrunch 3067 days ago
My issue was that I wasn't very familiar with ipv6, and my ISP (OVH) apparently gave my server a range of about 256 ipv6 addresses, and I didn't really know how to properly set up reverse DNS and SPF. After spending a day or two getting nowhere, I just decided to turn off ipv6 completely for the server.
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megous 3067 days ago
Hmm, but where do you ask for that?
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cpncrunch 3067 days ago
I think this is the link:

https://support.google.com/mail/contact/msgdelivery?vid=0-35...

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