I resolved it after testing several possible resolutions.
For anyone with the same problem, just use a resolution described in this link: https://support.plesk.com/hc/en-us/articles/213360809
Resolution
Open /etc/postfix/main.cf configuration file and comment out the following lines...
Hello,
I have the Plesk Onyx 17.0.17 Update # 12, CentOS 6.8 (Final), and I'm having problems with SMTP authentication on the Gmail web client.
The connection via POP3 is working perfectly and the emails are being received in my Gmail account, but the connection through SMTP is not being made...
Thanks for your attention, here's the information:
- What version of Plesk you are using: Plesk v12.5.30_build1205150826.19
- Are you using Postfix or Qmail: Postfix. The error is only in Postfix, in Qmail the connection working okay.
- What OS: CentOS 6.7 (Final)
- Logs...
Yes, when i try use the Thunderbird the error message is:
Sending of the message failed.
The message could not be sent using Outgoing server (SMTP) smtp.naopera.com.br for an unknown reason. Please verify that your Outgoing server (SMTP) settings are correct and try again.
Hello,
I'm having a problem with the authentication of my emails when I try to use in web mail clients like Gmail or Outlook.
I release port 587 in Plesk but when I try to authenticate displays the error below.
I've done all user checks and password and everything is correct.
I exchange the...