Resolved SMTP error 250

[ear]

Hello,
I am newbie with Plesk, and I have a problem with emails.
When I send an email(webmail), I have the error: SMTP error (250)

I read this topic: Resolved - SMTP Error (250): failure during authentication (ROUNDCUBE)
with the answer of UFHH01

For confirmation, where is the information ? /etc/postfix (main.cf) ?

Thank you

 

[IgorG]

Yes, it is about /etc/postfix/main.cf config file.

 

[ear]

I modified the file and now I don't have the SMTP error 250.
But when I send an email to an external domain, I don't receive the email.
On my Plesk, I have two domains. If I send an email from my-domain1 to my-domain2, it works.

The problem is related to the file(main.cf) or the DNS ?

 

[ear]

I found a solution: I disabled Greylisting and now it works