Do ISPs Block Senders?

By Shiloh Pettyjohn in Etiquette, Questions Answered on

Every ISP (Internet Service Provider) has their own rules and procedures.

The industry standard is generally thought to be that ISPs will block a sender IP address (an Internet Protocol address, which is a numerical identification that is assigned to devices participating in a computer network utilizing the protocol for communication between its computer) if it gets 1 complaint out of about 1,000 emails sent.

So, if you are getting spam, definitely report it.

Unfortunately serious spammers (of the viagra and fake watch variety) don’t send from one constant IP address. They vary it often and make it otherwise very hard to spot them, so reporting may not stop it.

The people who do use a constant IP address are generally from a real company and either don’t know better or thought they were some how above it (they did have a box you checked which said they could spam, I mean email you).

For those who are sending these emails.  Make sure people want what you are sending and you are sending what you said you would.  If you are using an old list, some of your subscribers may have forgotten about you or their email addresses may no longer be valid. There are even some subscribers who just use the complaint (“mark as spam”) button when they want to get off of a list because it is more convenient than the unsubscribe link.

So, put the unsubscribe link at the top and the bottom so that people will do that before they hit the report spam buton.