![]() The reverse DNS is correct and I have SPF records for the domain. To answer your questions:ġ) Yes, I have a domain. Is there anything I can do to remedy this situation? I'm two years into a three-year contract. Nobody likes Comcast, but I don't have a choice here. When I ask my other tech friends what they would do, they simply suggest changing ISPs. ![]() If I did, I could possibly go after the source and try to get my IP whitelisted. Obviously, they are getting anti-spam policies from a central location of some kind. The part that bugs me is that this happened two weeks ago with multiple major email services. ![]() However, I can not find a single option to do so. Since I am not doing any of those things, I would expect some sort of option to have my IP whitelisted or verified. They send rejection notices back to my server that contain "tips" on how to make sure I'm not an open relay, causing spam, etc. Yahoo and Hotmail on the other hand, just flat out reject the traffic at lower level. With Gmail, I can instruct users to flag my emails as "not spam" because the emails actually go through, but simply end up in the spam folder. I can understand the desire to limit spam - but here is the big problem: I have no way to combat this. It appears that all three of those major email services started rejecting email from me based on a single condition: Comcast. My mail server is not set as an open relay, and I use SPF records and pass all SPF tests. I checked, and my IP is not on any real time blacklists for spammers, and I don't have any security issues. The following email services started rejecting all email from my server: Hotmail, Yahoo, and Gmail. About two weeks ago, I came across a serious issue. It has been mostly fine these last two years, with the occasional outage due to typical Comcast issues. It's a business connection with no ports blocked, etc. They provide me 5 static IPs and much faster speeds. Approximately two years ago, I switched to a faster connection, which now is hosted on Comcast. I had always used a local Denver ISP on a single static IP. New submitter hawkbug writes For the past 15 years, I have hosted my own email server at home and it's been pretty painless.
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