Hello all
If I send email for only for xyz@domaion.com I have next error
SMTP Protocol Returned a Permanent Error 530 authentication required for relay (#5.7.1)
Do you help me please.
Thank you
Subject: TLS
The target domain administrator has configured his Domain not to accept Transport Layer Security (TLS) without authentication.
a) your source domain administrator will configure your servers to NOT send mails using TLS - which is less secure and not really best practice.
b) the administrator of the target domain will have to change their configuration to match common practices.
Without saying who is right or who is wrong, I personally would prefer option b.