Error: SMTP Error 250

What's Causing This Error

SMTP error 250 typically indicates that the SMTP client failed to authenticate the user due to invalid user credentials or misconfigurations within the client.

Solution - Here's How To Resolve It

It is essential to pay attention to the following parameters when resolving this error:

1. SMTP TLS Protocols
2. SMTP TLS Ciphers

The user credentials may also require validation to ensure that the email server accepts them.