G-Lock EasyMail » account numbers http://www.glockeasymail.com Create and Send that Killer HTML email newsletters Mon, 26 Apr 2010 09:55:36 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 How HTML Code Affects Anti-Spam Filtershttp://www.glockeasymail.com/ultimate-email-marketing-guide/how-html-code-affects-anti-spam-filters/ http://www.glockeasymail.com/ultimate-email-marketing-guide/how-html-code-affects-anti-spam-filters/#comments Fri, 03 Oct 2008 11:04:57 +0000 admin http://www.glockeasymail.com/?page_id=560 It is believed that an email gets filtered because it contains any of spam trigger words or phrases or because the sender is unknown to the recipient. This is not always true.  Of course, certain words and phrases may cause a message being filtered but ISPs may also block your legitimate email for reasons you may not be thinking of, for example a HTML code.

You know some ISPs rely on the message HTML code to determine whether the email is legitimate or spam. For instance, the emails with an outdated or incorrect code end up in bulk or junk mail folders when sent to such domains as MSN/Hotmail and AOL. Why do some ISPs validate HTML code? Because of spammers, of course. Using wrong HTML syntax spammers try to fool standard content filters.

You may think that everything is OK with your HTML code if the message renders correctly and looks just fine to you. Not always! Each ISP handles email differently, and the messages that get past the filters at one destination may be filtered or entirely blocked at another.

Here are some particularities of a HTML code that can trigger anti-spam filters:

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