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New Visitor
Posts: 3
Registered: ‎09-16-2003

551 not our customer

I have mail automatically forwarded to my comcast account from several yahoo accounts.

Multiple times over the last 4-8 weeks, Yahoo stopped forwarding mail and reported this error message:

Remote host said: 551 not our customer

I have removed the spam filter on yahoo with no effect. I can still send and receive email through comcast using Eudora.

Anybody have a fix for this.

Jeff z.
Most Valued Poster
Swiper-the-Fox
Posts: 679
Registered: ‎05-06-2004

Re: 551 not our customer

you did not type in your forwarding email address in correctly at yahoo is my first assumption. not_our_customer means the email address was not recognized as being a valid account at comcast.
New Visitor
Posts: 3
Registered: ‎09-16-2003

Re: 551 not our customer

The e-mail address worked fine for many months and only the past two months has an occasionally message been kicked back from comcast with this error message. I go through the routine of reactivating the forwarding on yahoo and it works for awhile and then comcast decides not to recognize my account again. So it does not seem to be a typographical error.

jeff z.
Most Valued Poster
Posts: 8,389
Registered: ‎10-17-2003

Re: 551 not our customer

Well, then I would call Comcast. 1-800-COMCAST

Naddie