Are some addresses always required to confirm?

We take many steps to ensure that addresses are not added fraudulently or maliciously to customer accounts.

If an email address at a major domain is submitted to your list, and the "user" part of the email address (the part before the @ symbol) is four characters or fewer, that subscriber will need to confirm.

For example, the following addresses will always need to confirm:
bob@aol.com
test@hotmail.com
jeff@yahoo.com
asdf@gmail.com
Why?


In most cases, extremely short user names in the most popular domains are either mistypes, blatantly bogus, or dead email addresses.

All of those can negatively affect your deliverability. So, in order to prevent them from being fraudulently or maliciously subscribed to your list, they will need to confirm.
 

How Do We Determine "Popular" Domains?


We look at email addresses adding to lists by filling out web forms. We take the most commonly submitted domains and base this on that list. The list is recalculated daily based on the previous day's signups.

Domains that will frequently be on the list include:

yahoo.com
hotmail.com
aol.com
gmail.com
msn.com
comcast.net
yahoo.co.uk
yahoo.co.in
hotmail.co.uk
sbcglobal.net
bellsouth.net
att.net
earthlink.net
cox.net
rediffmail.com
verizon.net
btinternet.com
ntlworld.com
yahoo.ca
adelphia.net
charter.net
juno.com

 
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