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Spam Triggers

Home>Resources>Ensuring Deliverability>Spam Triggers
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Spam Triggers

Spam is a large problem on the Internet and can lead to mail servers becoming blocked for future sending. This is especially painful in a shared environment, because one spammer can affect many innocent users. It is our responsibility as a mail service provider to take measures to prevent spam from originating on our systems. While it is in everyone’s best interest to stop spam, we do not want to inconvenience legitimate users who may have inadvertently triggered our scanners. To determine why your email attempt resulted in this error, and to prevent future emails from being blocked, please have a look at the below possible reasons for the mail being blocked.

Mail subject and body content

By far the biggest triggers of spam for everyday mail is the subject and body text of your mail, spam filters are very sensitive to message content and its advised to try and avoid the following words and phrases if at all possible.

!!! #1
$$$ 4U
100% free 50% off
Act now! Accept credit cards
ALL CAPITALS Additional income
All natural Affordable
As seen on All new
Attention Apply now
Bad credit Apply online
Bargain Be your own boss
Best price Buy direct
Billion Call free
Certified Cancel at anytime
Cost Cash bonus
Dear friend Cheap
Decision Click here
Discount Congratulations
Double your income Direct email
E.x.t.r.a. Punctuation Direct marketing
Eliminate debt DonÕt hesitate!
Extra income Drastically reduced
Fast cash Earn $
Fees Full refund
Financial freedom Get it now
FREE Gift certificate
Guarantee Great offer
Hot Home based
Increase Incredible deal
Join millions Information you requested
Lose weight Insurance
Lowest price Investment
Make money fast Limited time offer
Marketing Message contains
Million dollars No age restrictions
Money No experience
Money making No gimmicks
No medical exams No hidden costs
No purchase necessary No questions asked
Online pharmacy Offer
Opportunity Online degree
Partners Online marketing
Performance Order Now
Rates Passwords
Satisfaction guaranteed Please read
Search engine listings Risk free
Selling Save $
Success Serious cash
T e x t w i t h g a p s Special promotion
Trial Urgent
Visit our website Web traffic

HTML has a low text to image ratio

When screening HTML for red flags, spam filters examine the ratio of text to image. If an email contains either too many images or a large single image area relative to a small amount of actual text, points are added to the spam score, increasing the chances that the message will be blocked.

Links

Messages with links to external web pages are more likely to be identified as spam. It’s also advised to always use the fully qualified domain name instead of IP addresses ( http://example.com vs http://1.2.3.4 )

Sending server reputation

If your sending server has recently sent out a lot of spam, all messages coming from that server may be blocked, even if they are not spam. You can use a third-party website such as MX Toolbox to check your IP address against many different block lists at once. There are several free websites available for this kind of check.

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