I have difficulty on my business email
I have difficulty on my business, due to one of my partner company cannot sent email through "rc-goldenrobot.com". Their email is "@otc.co.th" Example of email addresses are email@example.com, firstname.lastname@example.org, email@example.com and etc. Please help me to be able to receive the emails from them in the future. Their might be some blocked, until now I just get the problem with this company's email.