<html><head></head><body>99.9% likelihood they're trying to send to "technopolis.ca" or "tecnopolis.com", no matter what the agent on the phone is saying. Ask me how i know :-(.<br>-Adam<br><br><div class="gmail_quote">On April 28, 2021 7:20:11 a.m. CDT, Trevor Cordes <trevor@tecnopolis.ca> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre dir="auto" class="k9mail">So there are tons of "email-sending" blacklists out there.<br><br>Are there "email-receiving" blacklists? Is that a thing?<br><br>We're trying to get emails from Hilton Honors to our @tecnopolis.ca email<br>address(es) and they just refuse to send to us. Even on the phone with<br>support to triple confirm the email address it refuses to send to us.<br><br>When I say refuses to send to us, I mean it won't even connect to port 25<br>on our server. Just nothing, nada. It's not a greylisting or RBL problem<br>on our side because it's not even opening a socket. I can tell, I have<br>full access to the verbose mail logs and tcpdump.<br><br>All other vendors seem to have no trouble sending to us. Just Hilton.<br>The big email providers like gmail send to us perfectly fine. I've never<br>seen anything like this.<br><br>Now, I do have trouble sometimes with Akamai's *web* hit blacklist, though<br>I'm mostly "good" with them now. People don't use Akamai *web* RBLs for<br>outgoing mail servers, do they? Is that a thing? I don't see that as an<br>Akamai product offering...<hr>Roundtable mailing list<br>Roundtable@muug.ca<br><a href="https://muug.ca/mailman/listinfo/roundtable">https://muug.ca/mailman/listinfo/roundtable</a><br></pre></blockquote></div></body></html>