Applicable to:
- Plesk for Linux
Symptoms
-
The following error message appears when mail is sent in Horde / Roundcube / mail software:
PLESK_INFO: Warning: There was an error sending your message: Error connecting to SMTP server.
-
In Horde log /var/log/psa-horde/psa-horde.log, the following error can be found:
CONFIG_TEXT: ERR: HORDE [imp] Error connecting to SMTP server. [111] Connection refused [pid 6716 on line 1160 of "/usr/share/psa-horde/imp/lib/Compose.php"]
-
The following error message appears when mail is sent in Roundcube / mail software:
PLESK_INFO: SMTP Error (-1): Connection to server failed
- Postfix is used as mail service.
-
Postfix service is in stopped status:
# service postfix status
Redirecting to /bin/systemctl status postfix.service
● postfix.service - Postfix Mail Transport Agent
Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled)
Active: inactive (dead)
Cause
SMTP Server Postfix is not running and thus cannot process mails.
Resolution
1. Connect to the server via SSH.
2. Start the service SMTP Server (Postfix):
# service postfix start
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