There was a problem loading the comments.

Questions about Let's Encrypt SSL

Support Portal  »  Knowledgebase  »  Viewing Article

1. Ho many maximum sub-domains can use this SSL, is there any quantity for per-domain?
There is not limit on how many domains can use a certificate. However, you can only generate 50 certificates per domain per 7 days according to Let's Encrypt.
The subdomains from the same domain zone like and have the same rate limit. Thus, when the first 50 domains of get a certificate, the rest need to wait for a week.

2. Is there anyway can use this SSL for mail.DomainName it's also consider as sub-domain.
So far securing the mail server for multiple domain names (known as SNI) is a feature that it is not implemented in Plesk because the mail server does not support it: Is there SNI support for SMTP/IMAP/POP3? However, you can secure the mail server by following this article:

In regards to your other request, it is possible to access emails via instead of Please refer to the following article: How to set up an access to webmail over

Share via

Related Articles

Copyright © 2023 TheGigabit. All right reserved. Reg.No: 200701034297 (792326-P)