

What that means is that anything could be labeled as spam, depending on what everyone considers spam to be at any point in time. Future emails that contain that phrase might be more likely to be filtered out as spam, and not arrive at their destined inboxes. When someone hits the “This is SPAM” button in an online email interface (like Gmail,, and others), that system takes that to mean “Email that looks like this is spam to me.” If enough people mark similar email as spam, any email considered similar to that email stands a much higher chance of being automatically filtered as spam, regardless of what it contains.įor example, if a million people on an email service get an email that says “The sky is blue”, and half of them mark it as spam 2, that particular email service may consider “The sky is blue” as an indicator of possible spam. The eye of the beholderĭespite this list of factors that might contribute to your email being considered spam, things aren’t nearly so cut and dried. The unfortunate reality of the situation is that the more your email looks like spam, however innocuous, the more likely it is to be treated as spam. It’s important to realize that no one is saying that any of those things in your email is bad, or that any one of those things will cause your email to be blocked. Because so much spam is an attempt to get you to buy something, many filters look for various words and phrases associated with sales and marketing efforts. HTML email. It’s not a huge mark against you, but some spam filters still consider HTML or “rich text” email as having a higher likelihood of being spam when compared to plain text email.(If you don’t know how to even make that happen, don’t worry about it.) Fake, inconsistent, or illegal return addresses or, a “reply-to” address that does not match the “from” address.Spam filters often consider shouting (typing in all caps) as sales copy. Certain drugs (typically linked to sexual performance or characteristics).Some things to watch for in your email include: As soon as you collect too many points (where “too many” is arbitrary, and up to the receiving system or the individual recipient to define), your email is flagged as spam. Spam filters look at your email and assign points for various behaviors associated with email that “looks like” spam. It’s the mistakes associated with that thinking that cause legitimate email to be mistaken for spam. The receiving system thinks you have a reputation for sending spam.The receiving system thinks your email looks too much like spam.Legitimate email can get blocked in error for a couple of reasons: Spam generally doesn’t cause bounces, but is discarded or placed in a spam folder instead.

Reputation of the sender, and any services used, matter more than ever.What recipients think is spam is not in your control.It’s easy for email to accidentally “look like” spam.
