I am having a problem with emails from my account (myusername@sbcglobal.net) periodically bouncing when I send email addressed to people in one particular domain. Some emails will get through, but some emails to the same user will bounce back to me with the following error (different users at times, but same error in all emails):
Remote host said: 550 5.1.0 error: R4.1: 66.94.237.136 [MAIL_FROM]
I can send you the full bounced email content if that is of additional use.
On the receiving side they checked with their ISP who reported the following ...
"We have checked the mail logs for the header information provided by you. The problem is that the IP the mail is coming from is not a valid MX for the domain, nor is the reverse in the same domain and the from address. One or the other has to be true for us to accept mail. Sender mail server has to be one of the mx records (if they have no control of reverse). Please contact the sender mail server admin to correct this."
Please help me to resolve this issue.
Thanks,
Randal
Remote host said: 550 5.1.0 error: R4.1: 66.94.237.136 [MAIL_FROM]
I can send you the full bounced email content if that is of additional use.
On the receiving side they checked with their ISP who reported the following ...
"We have checked the mail logs for the header information provided by you. The problem is that the IP the mail is coming from is not a valid MX for the domain, nor is the reverse in the same domain and the from address. One or the other has to be true for us to accept mail. Sender mail server has to be one of the mx records (if they have no control of reverse). Please contact the sender mail server admin to correct this."
Please help me to resolve this issue.
Thanks,
Randal