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Originally Posted by tony17112acst
A different Comcast tech call me today and said that freeohstia is on a blacklist so thats why comcast isn't sending the messages to them. But thanks to you guys on here I told him that typically blacklists are for RECEIVING emails, not for the sending (Comcast). So he said he'll do more research and call back on Tuesday.
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Well, like I said, it's not impossible for it to be a blacklist problem if Comcast has made some policy decision not to send to mail servers that are on blacklists, but this would be a
very unusual policy on their part. I've never known anybody to do this, and I can't see any logical reason to do so.
Further, 50Webs' mail server is not on a blacklist, and when you tried to send email from your Comcast.net address to there, that also failed.
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Another brainstorming thought: Comcast's SMPT emails don't attempt to hand off the emails to freehostia (Comcast admits this and Freehostia support claims no log entries). But I can browse to my website at freehostiaa just fine using Comcast's connection ...so does that prove it's not a routing issue with Comcast? thanks!
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It's difficult to say. You're correct that it would seem to suggest it's not an issue
at the router, but there could still be an IP-level communication from Comcast's mail servers specifically, and Comcast is also such a large network that it's possible web traffic is routed or handled differently from e-mail traffic.