![HELP! Mail Authentication Failling after Mailgun removal - aaPanel - Hosting control panel. One-click LAMP/LEMP. HELP! Mail Authentication Failling after Mailgun removal - aaPanel - Hosting control panel. One-click LAMP/LEMP.](https://forum.aapanel.com/assets/files/2020-09-08/1599591566-330163-mail-server-log.png)
HELP! Mail Authentication Failling after Mailgun removal - aaPanel - Hosting control panel. One-click LAMP/LEMP.
Resolving Error Message "Unable to connect to Remote Server" while sending a test email in Portrait Dialogue
![Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center' Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center'](https://www.ibm.com/support/pages/system/files/inline-images/image_2459.png)
Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center'
![HELP! Mail Authentication Failling after Mailgun removal - aaPanel - Hosting control panel. One-click LAMP/LEMP. HELP! Mail Authentication Failling after Mailgun removal - aaPanel - Hosting control panel. One-click LAMP/LEMP.](https://forum.aapanel.com/assets/files/2020-09-08/1599591529-11812-dns-inpect-test.png)
HELP! Mail Authentication Failling after Mailgun removal - aaPanel - Hosting control panel. One-click LAMP/LEMP.
![Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center' Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center'](https://www.ibm.com/support/pages/system/files/inline-images/image_2458.png)
Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center'
![Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center' Enable to send email, server reported error" or "Email server reported an error ... Could not connect to SMTP host" error when trying to send email inside 'Command Center'](https://www.ibm.com/support/pages/system/files/inline-images/image_2445.png)