kb: technical
ext: le
Plesk Onyx for Linux
ABT: Group A
Applicable to:
- Plesk Onyx for Linux
Symptoms
- Unable to send and receive mail for the domain on the Plesk server. Mac mail client reports that mail server SSL certificate for mail server mail.example.com hosted in Plesk is invalid/expired:
- Microsoft Outlook reports that certificate is outdated:
- SSL checker https://www.ssllabs.com/ssltest/ and web browser report that certificate for mail.example.com is valid and up to date.
Cause
Wrong certificate is set up for mail server in Plesk UI.
Resolution
Note: the domain name of mail server specified in mail client's settings must match domain name in the SSL/TLS certificate. Otherwise, SSL/TLS connections mail client will report about certificate issues.
- Log into Plesk
- In Plesk go to Tools & Settings and click SSL/TLS Certificates.
- Click Change next to Certificate for securing mail > select the valid certificate > click OK.
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