My email domain is hosted by Dotster. For the past year or so, when I send emails to people with comcast.net domains, they often do not get delivered, and I receive a non-delivery error message from my provider. When I complained to Dotster, they said Comcast has flagged my domain (scottandmartin.com) as spam. they said I must ask Comcast to fix this. (I have already asked my friends to whitelist my email address, but it has not solved the problem)
Here is the relevant text from Dotster's instructions: "You received this bounce back because our outgoing mail server IP was blacklisted. We are aware that some of our customers are receiving bounce back while sending emails due to IP blacklist. Our engineers are working on the issue and trying their best to find a permanent resolution for the issue. Right now we have rotated our mailout server IP address and you should be able to send emails. Please let me know if you are able to work with your client to white list our mail server *.eigbox.net and your domain name.
"As a shared hosting company with many customers using our email servers, we are sometimes falsely accused of contributing to spam, and therefore are blacklisted. In order to minimize the impact of IP address block we are rotating the server addresses along with several methods."
Are you able to resolve this issue for me, so I can communicate with my friends, family and clients who are your customers?
Feel free to PM me the details of the domain you are having issues with and I can investigate this issue for you.
In the overall gist of the issue, hosted domains are always going to be an issue because they are shared amongst multiple domains. Sometimes emails get compromised and it happens on any email platform. This causes scam/spam/phishing emails to be distributed. When that happens many providers will either filter,drop, or blacklist those emails due to the volume of malicious emails. This isnt an exact number, but lets say you shared the hosted IP with 50 other domains and 49 of them are in violation of the Can Spam Act or are distributing ransomware. We would place the block for the IP and provide the appropriate bounceback when messages are blocked/bounced. We also reference to our unblocking process within those messages, which is http://postmaster.comcast.net/IPB-removal.html.
The IP owner would be the one to fill out that form to request the unblock.
Within the unblock request for obvious reasons, we ask what was done to fix the issue. In some cases domain hosts either dont have an abuse desk or deal in too large of a volume to justify filling out the form and leave the IP blocked by Comcast or just band-aid the issue by changing their server IP. Reason its a band-aid is because if there are still compromised emails sending malicious content - the new IP will be blocked/blacklisted again.
EDIT: It appears i skimmed right over the domain, i can process a filtration clear which will apply within an hour. The flag was placed by IP due to a high number of complaints from comcast.net users (this usually means majority of the emails coming from the ip were marked as spam by our users).
I am grateful for your explanation and assistance. We shall see if your unblocking of my IP domain will solve the problem. Thanks so much.