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Email sent from private domain flagged as spam because not going through Comcast servers?

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Email sent from private domain flagged as spam because not going through Comcast servers?

About 4 months ago, I noticed that emails sent from my private domain (dirkmarketing.com) are going to many people's spam folders or are being blocked outright for no apparent reason. I'm no spammer, nor do I have a history of spambot/virus infection. Previous to this, my emails were never marked as spam or blocked, and I've used this email address for years.

Currently, my email is sent using Outlook 2016 on my desktop with my private mailserver set as outgoing and incoming mailservers. This is how I've ALWAYS had my email set up. However, when I ran my IP address (73.239.83.58 - one of Comcast's blocks) through MXToolbox, I saw that it was blacklisted from three places (Pesky, SpamHaus, and SORBs). Removing this IP is nearly impossible, but I read on the Spamhause website specifically, I read, "Email sent by Comcast subscribers using a mail program such as Outlook Express are required to send the email through Comcast." 

So my question is this -- am I supposed to use a Comcast outgoing mailserver when sending emails from my own domain? Could this be what is causing my recent "spam" issue?

Email Expert

Re: Email sent from private domain flagged as spam because not going through Comcast servers?

My guess is yes-----you need to try using a Comcast server.  But Comcast security can tell you more than I can------------------------

 

Comcast Customer Security Assurance-------------------

Normal business hours (6:00 am to 2:00 am EST, 7 days a week)

1 - 888-565-4329




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Gold Problem Solver

Re: Email sent from private domain flagged as spam because not going through Comcast servers?


... I saw that it was blacklisted from three places (Pesky, SpamHaus, and SORBs). ...

This is normal. ALL dynamic residential IPs are, or should be, blocklisted.

 


small-fry wrote: ... "Email sent by Comcast subscribers using a mail program such as Outlook Express are required to send the email through Comcast." ...

That's not quite correct. You can use any email server you have a login for, including one for your own domain. You just can't host a mail server on a dynamic residential IP address. Between that, and the fact that email delivery port 25 has been blocked on residential modems and gateways for several years, I'm surprised that you haven't had problems with this long before now.

New Poster

Re: Email sent from private domain flagged as spam because not going through Comcast servers?

You misunderstand. I haven't hosted a mailserver on a machine with Comcast's service (especially considering the dynamic IP aspect you described). And I haven't used Port 25 in years.

 

What I'm trying to ascertain is why my emails from my private domain are suddenly getting marked as spam or undeliverable. I'm trying to uncover the issue, turning over every stone I can to find the cause. And if my problems would be resolved by resetting my dirkmarketing.com outgoing mailserver to a Comcast one, then I'll try it. But I really have no desire to call tech support at Comcast and talk to a non-expert who is going to walk me through the most mundane settings because he/she doesn't understand the real problem.

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