Error

Hello all,

I am facing a problem with one of my company email. I tried for a long time to send an email and I always receive this error: ERROR_CODE :550, ERROR_CODE :5.7.23 SPF access denied;

The problem seems to appear when I try to send to a specific email account. Other persons receive my emails without any problem.

Could someone explain me what is the problem and how to solve it?

Thanks,
Abed Balan