May 20, 2014

Email SPAM - How To Beat the Spam Gremlins

Spam Gremlins, the evil creatures that generate Email Spam, are something we're told we just need to live with and deal with - like Fire Ants in the Southern USA or cockroaches in the North.  

Whiles this seems true for most people, there are many tactics and software that can considerably reduce the amount of junk emails arriving in your inbox.  Some spam is just an aggravation and a waste of time but other spam can arrive carrying danagerous computer viruses that can destroy data and cost tens of thousands of dollars in damage.

The Website Hosting Packages offered by Cole WebMarketing offers state of the art spam filtering.   Usually during the initial set up, filters are enabled and configured to filter some, more, or as much as possible, using a simple "slider" that goes from 1 to 10. Setting the global spam filter, called Spamdyke, at 6-7 seems to be the norm for most of our business clients.  Graylisting, which provides a secondary layer of protection, can also be activated upon request.

For more details on Spamdyke and Graylisting, please continue reading:

Spamdyke is a spam protection program that filters incoming messages at the SMTP level by blocking connections from mail servers identified as spam sources or that match certain reverse DNS validation rules.  

The Spamdyke program is enabled by default. We can enable or disable Spamdyke and configure its options for you from our online Control Panel's Mail Manager section. Spamdyke can be configured only globally for the hosting account; it cannot be managed per mailbox.

Spamdyke uses several methods to determine whether a sending server can be identified as a spam source:

1. Reverse DNS check
If there is no valid reverse DNS name of the sending mail server, the message will be blocked and returned to the sender with the following error:
554 Refused. You have no reverse DNS entry. Contact us for details.

NOTE: If you are trying to send through the SMTP server of your hosting account and you receive the above message, please change the port of the outgoing server from 25 to 587.

If you are not a customer of Cole WebMarketing services and you receive the above error when sending to a server maintained by us:
If you receive a bounced message with the error "You have no reverse DNS entry", then the SMTP server you use does not have a reverse DNS name. You need to contact the administrator of your mail server to have the DNS entry fixed, or you need to use another SMTP(outgoing) mail server.

. Graylisting/Greylisting (optional)

Spamdyke can also be configured to use Graylisting. Graylisting is the technique of denying mail delivery the first time a sender tries to deliver to a recipient. The next time the remote server attempts to deliver the message, it is accepted. All future messages from the sender to the recipient are also allowed. 

With Graylisting enabled, our mail server will "temporarily reject" any email from a sender it does not recognize. The originating server will try a new delivery, usually in a few minutes, and if the mail is legitimate, it will be accepted.

If the mail is from a spammer it will probably not be retried, as spammers go through thousands of email addresses and cannot afford the time delay to retry a particular message. Standard mail servers, however, always attempt to deliver messages again if they are rejected with such a “temporary” error message, in accordance with the SMTP RFC specifications.

Graylisting is not enabled by default, you need to simply request us to enable it for you.

Note: Filtered Messages and Junk folder
Please note that messages filtered by the Spamdyke program are blocked at the SMTP level. Therefore, in case you have Spamdyke enabled, the messages blocked by it will not be delivered to your Junk Mail folder.

: Filtered Messages and White lists (Spam Assassin)
Please note that the white/black lists do not affect the Spamdyke program. In other words, if you have a certain sender email address whitelisted, messages coming from this sender will still be processed by the Spamdyke program and might be blocked.


Cole WebMarketing is a Charlotte, NC based internet marketing services provider specializing in B2B (business to business) companies.   Primary Services include: website domain registration, website hosting, business email, website design, site redesign, website maintenance, webmarketing consulting, website photography and videography (plus pro video production for website or other online marketing). 

For more information, please visit and then call 704-456-WEB1 (9321) to get a free quote on our services that you need to ''make your website make you more money''.