I get returned mail with the error "551 not our customer" when trying to
forward mail. I can send new mail to the same contacts with no problem.

I am generally having the same problem. I can send new emails, reply to fully opened emails and forward emails. When I reply from a not opened email, I get error 551 'user not a customer'. Help?

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frmsrcurl: http://msgroups.net/microsoft.public...g-mail-outlook

I am having the same prob and when I tried to call for help they want $49
bucks.... half of my contacts no longer appear and I cannot even send them a
NEW mail ...undeliverable and that not our customer/551 comes up. ARRRGH! Has
Outlook crashed?

"problemcat" wrote:

>
> MLV0764;126085 Wrote:
> > I get returned mail with the error "551 not our customer" when trying
> > to
> > forward mail. I can send new mail to the same contacts with no
> > problem.
>
> I'm having the same problem. It just started yesterday.
>
>
> --
> problemcat
> http://forums.slipstick.com
>
> .
>

Same Problem started yesterday, now I can't send any emails and the addresses do not automatically pop up, even after restart and outlook repair/update. Is there an iphone app to blame? I used a linked-in iphone app update yesterday and believe it may have duplicated some addresses.

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frmsrcurl: http://msgroups.net/microsoft.public...g-mail-outlook

Same problem here. Started yesterday, 4/19/10. Newly created e-mail go out but not fwd or reply. Is it an Outlook or ISP issue. Happens with both Outlook XP om an XP machime and Outlook 07 on a Vista machine. I use BellSouth, ie.e AT&T DSL.

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frmsrcurl: http://msgroups.net/microsoft.public...g-mail-outlook

I am havinfg the same problem in reply or forward.

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frmsrcurl: http://msgroups.net/microsoft.public...g-mail-outlook

I'm having a simular issue.
outlook 2002 will not allow me to send mail get error message 551 not our
customer
I am able to receive all e-mails from other hosts but I am not able to reply
or send new mail if they do not have the same e-mail provider.

Can I get help!!

"MLV0764" wrote:

> I get returned mail with the error "551 not our customer" when trying to
> forward mail. I can send new mail to the same contacts with no problem.

"Robin" wrote:

> I'm having a simular issue.
> outlook 2002 will not allow me to send mail get error message 551 not our
> customer
> I am able to receive all e-mails from other hosts but I am not able to reply
> or send new mail if they do not have the same e-mail provider.
> I am also using BELLSOUTH
> Can I get help!!
>
> "MLV0764" wrote:
>
> > I get returned mail with the error "551 not our customer" when trying to
> > forward mail. I can send new mail to the same contacts with no problem.

Are you all using BELLSOUTH.NET ????????

"Robin" wrote:

> I'm having a simular issue.
> outlook 2002 will not allow me to send mail get error message 551 not our
> customer
> I am able to receive all e-mails from other hosts but I am not able to reply
> or send new mail if they do not have the same e-mail provider.
>
> Can I get help!!
>
> "MLV0764" wrote:
>
> > I get returned mail with the error "551 not our customer" when trying to
> > forward mail. I can send new mail to the same contacts with no problem.

I am using bellsouth.net, and having exactly the same problem - can't reply
to messages, and losing email addresses. It started this morning - Feb. 20.

Does anyone have a hint how to fix it?

"Robin" wrote:

> Are you all using BELLSOUTH.NET ????????
>
> "Robin" wrote:
>
> > I'm having a simular issue.
> > outlook 2002 will not allow me to send mail get error message 551 not our
> > customer
> > I am able to receive all e-mails from other hosts but I am not able to reply
> > or send new mail if they do not have the same e-mail provider.
> >
> > Can I get help!!
> >
> > "MLV0764" wrote:
> >
> > > I get returned mail with the error "551 not our customer" when trying to
> > > forward mail. I can send new mail to the same contacts with no problem.