In House Exchange Server Outgoing Email

I manage the email server (exchange) for a small business. They just recently signed up for comcast business internet.

The problem we're having is outgoing email from the exchange server is automatically blacklisted because it's coming from the comcast ip block.

Supposedly there are comcast smarthosts that your exchange server can utilize to send through. However I have not been able to find those in any of the documentation and comcast business support hasn't been much help either.

A business with an Exchange server is a common thing. You would think that comcast would have this in their documentation or be able to answer the question in a support call.

Any suggestions?

Responses

jd_on_ice

New Contributor

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2 Messages

9 years ago

Oh, and there is no dns tab under the main admin account email settings

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VBSSP-RICH

Advocate

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1.4K Messages

9 years ago

Hello jd_on_ice and welcome,

If you are having issues with your non-Comcast email server being blacklisted as long as there have been no standard violations then you need to please use http://www.comcastsupport.com/rbl for assistance. Please provide any primary email laddress that contains the domain name of the email server.

Hope this helps you out.

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tmittelstaedt

Problem solver

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326 Messages

9 years ago

" outgoing email from the exchange server is automatically blacklisted because it's coming from the comcast ip block."

I run http://www.portlandiacloudservices.com an email provider on Comcast. Your information is incorrect. Despite what misinformed admins may tell you there is not a single reputable RBL on the Internet that operates a "scortched earth" policy where they block entire subnets because of 1 misbehaving IP address.

There are a handful of special blocks people run that do block entire subnets where over 90% of the IPs on those subnets are routinely involved in spamming, and just about all of these target Asian subnets only.

There are also on occassion a cornball admin who runs their own private RBL who may do scortched earth. You will have to handle that by having your CEO talk to his CEO.

Your problem is you inherited an IP address formerly used by a spammer. You will need to just start using it, then laboriously track down every RBL that has blocked you and do delist requests. You will also need to setup proper PTRs on it and you will need to turn off "domain name privacy" at the Registry your domain name is at. Trust me nothing annoys me more than getting a delist request from a jerk who has no PTR and is trying to send from a domain name that when I query the name in whois has "privacy domain" on his DNS or has obviously bogus email addresses and street addresses as his contact info and i always roundfile those or send a nastygram if I'm not feeling charitable that day.

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