error while sending emails to yahoo

[dyaadyaa164854]

hello
Site sends messages to Hotmail and Gmail.
But, does not send any message to Yahoo Mail
I tried to use smtp and no change is happening
only When a change Members Mail this message appears in header

SMTP -> ERROR: AUTH not accepted from server: 530 5.7.0 Must issue a STARTTLS command first. e18sm2517979wjz.27 - gsmtp 
SMTP -> ERROR: MAIL not accepted from server: 530 5.7.0 Must issue a STARTTLS command first. e18sm2517979wjz.27 - gsmtp 
The following From address failed: admin@****.com

 

[theprogeekftw4717]

Hey,

For a perfect mail server, you need to setup a TLS certificate on your server. So basically, Yahoo isn't accepting a trusted server so setting up the certificate properly may fix it.

Regards

 

[dyaadyaa164854]

How to do?
I used vestacp to manage my server

 

[theprogeekftw4717]

Get a self signed TLS certificate and integrate it with your mail server. I guess you need SSH access for it.

 

[dyaadyaa164854]

yes, I mean toturial step by step
But, another script already using stmp without any problems.
roundcube work without any problem when sending or recieving Emails.