- Plesk for Windows
- MailEnable with enabled Smart Host is used: MailEnable > Servers > localhost > Services and Connections > SMTP > Properties > Smart Host
- Unable to send an email, below bounce is returned:
CONFIG_TEXT: Your message addressed to the target domain () could not be delivered because the mail server responsible for this domain returned a permanent error.
The server returned:
550 5.7.1 [IIA] Connection refused
All the mail is queued.
In SMTP Debug log at MailEnable > Servers > localhost > Services and Connections > SMTP > Logs the following error can be found:
CONFIG_TEXT: ME-E0059: [976D9E098B6C4982AE5C832D52E48799.MAI] Message Delivery Failure. Attempt (0): Could not connect to mail server for domain (). The remote mail server could not be contacted at this time. Message has been requeued.
The issue on Smart Host side.
Check the issue on Smart Host side.
login to the server via RDP
Disable Smart Host: MailEnable > Servers > localhost > Services and Connections > SMTP > Properties > Smart Host:
Restart SMTP service via Plesk Services Monitor: