We received a GREAT question this morning asking "I have been browsing the net for a compilation of bounce codes for ISPs such as Hotmail, Yahoo, Excite... A number of these providers either offer their codes on help pages or have been kind enough to email them through to me. I was wondering if there is a list anywhere that lists them all, highlighting Hard and Soft bounces as the ISPs see it? As an ESP, an up to date standardized list would certainly come in handy!"

So, we thought it might be helpful if we listed a few here and let others post/comment ones they know of.

AOL:
http://postmaster.aol.com/trouble/mailer.html
http://postmaster.aol.com/errors/index.html

Charter:
http://www.charter.com/visitors/general.aspx?ownerid=11

Comcast:
http://postmaster.comcast.net/mail-error-codes.aspx

RoadRunner:
http://security.rr.com/mail_blocks.htm

Yahoo!:
http://help.yahoo.com/l/us/yahoo/mail/postmaster/

We are listing these in hopes that senders can correctly interpret what they HAVE to do when they encounter bounces.

-Dennis
Eloqua

Don't Just Send, Deliver!