454 4.7.1 <[e-mail]>: Relay access denied

[Anagers]

Ok, so I am trying to test the webmail and it works fine, sending from my server to yahoo and yopmail email, everything is perfectly okay, however when I try to reply/forward the message that I got from yahoo and yopmail mailbox, trying to forward back to my server, it turns out that It is not working and got the 454 4.7.1 error, I tired everything I can do, I did a research but I got the same error. Please help!

454 4.7.1 [e-mail]: Relay access denied

This is the error on the server

Mar 24 14:08:20 s2000002 postfix/smtpd[22241]: connect from mail-out.yopmail.com[87.98.176.232] Mar 24 14:08:20 s2000002 postfix/smtpd[22241]: NOQUEUE: reject: RCPT from mail-out.yopmail.com[87.98.176.232]: 454 4.7.1 [e-mail]: Relay access denied; from=[e-mail] to=[e-mail] proto=ESMTP helo=<mx-out.yopmail.com> Mar 24 14:08:20 s2000002 postfix/smtpd[22241]: disconnect from mail-out.yopmail.com[87.98.176.232]

[SH]

You need to use authentication on SMTP. (please reopen if it is not that case)