MailEnable autoresponder does not send an autoreply.
In MailEnable Management > Servers > localhost > Servers and Connectors > SMTP > Logs > Activity > SMTP-Activity-date.log following message can be found:
127.0.0.1 AUTH xxxxx 504 Invalid Username or Password 34 18 postmaster@localhost
AUTH xxxxxx 504 User Account has been disabled by the mail administrator 62 18 postmaster@localhost
SMTP-IN XXX.MAI 984 127.0.0.1 RCPT RCPT TO: [email protected] 503 This mail server requires authentication when attempting to send to a non-local e-mail address. Please check your mail client settings or contact your administrator to verify that the domain or address is defined for this server.
After enabling debug for Plesk backend utilities (How to enable/disable debug logging for Plesk backend utilities on Windows), lines below can be found in
2019/05/23 17:36:14.024 1104 30216 Info: Create mail from='[email protected]', to='john.d[email protected]', subject='Re: Autoreply', body='Test auto-reply'
2019/05/23 17:36:14.025 1104 30216 Info: Send mail from '"" <[email protected]>' to '"" <[email protected]>'
2019/05/23 17:36:14.038 1104 30216 Warning: SMTP Exception
at sendMail([email protected], [email protected])(MessageProcessor::sendMail line 329)
Account postmaster@localhost is missed or disabled in MailEnable Management or registry.
Connect to the server via RDP.
Note: if direct RDP access to the server is not possible, contact server administrator for further assistance.
Go to MailEnable Management > Messaging Manager > Post Offices and check whether postmaster user exists under localhost domain. If postmaster user absent:
2.1. Delete localhost domain from MailEnable Management.
2.2. Disable and enable option Use the mail server installed with Plesk and the default mail account created by Plesk in Plesk > Tools & Settings > External SMTP Server.
Note: Domain with postmaster@localhost will be recreated by Plesk automatically.
If for some reason use of postmaster@localhost is not suitable, then make sure that
127.0.0.1 is set in Host name or IP address in Plesk > Tools & Settings > External SMTP Server.