mail server error: no posibility to receive mails after disabling TFA

mail server error: no posibility to receive mails after disabling TFA

Hi,

I activated the TFA to see how it work.
When I realized that it will complicate the login for my users I switch it off.

Now, after disabling TFA, we are not able to receive any email on our desktop client (Outlook).
We cannot receive any email at all. I do not receive any email also in zoho account/web application.

I tried to fix this problem but without any success.
I did the setup once again,s till the issue persist.
Hence, I do believe is something that I need to do in addition or my server mail info are not ok.

When others try to send me emails they receive the below error:
Sorry, we were unable to deliver your message to the following address.

< office@papeto.ro >:
No MX or A records for papeto.ro

--- Below this line is a copy of the message.

Received: from [98.137.12.56] by nm11.bullet.mail.gq1.yahoo.com with NNFMP; 07 Sep 2014 15:07:41 -0000
Received: from [98.137.12.237] by tm1.bullet.mail.gq1.yahoo.com with NNFMP; 07 Sep 2014 15:07:41 -0000
Received: from [127.0.0.1] by omp1045.mail.gq1.yahoo.com with NNFMP; 07 Sep 2014 15:07:41 -0000
X-Yahoo-Newman-Property: ymail-3
X-Yahoo-Newman-Id: 549781.66734.bm@omp1045.mail.gq1.yahoo.com
Received: (qmail 82354 invoked by uid 60001); 7 Sep 2014 15:07:41 -0000
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com;

Do you know how can i fix it?

Thank you!