I’ m looking for advise on requesting many certificates via the Plesk Let’s Encrypt plugin. The case is a WordPress multisite environment running on a VPS with Plesk. It contains around 6500 subsites, each with their individual domain names which are aliases for the main domainname of the WP multisite. Thanks to the Plesk Let’s Encrypt update we can now request SSL certificates for domain aliases as well. I want to start requesting certs as soon as possible, but I’m looking for the best approach.
The Let’s Encrypt plugin works great, however I’m wondering what is best practice as in the number of certificates that can be requested/renewed per day? I can imagine that requesting 6500 SSL certificates at once is not a good idea for both my VPS and the Let’s Encrypt API. Does anyone have experience with the Plesk Let’s Encrypt plugin and can advise on the max number of certs to request per day to prevent issues later on?
I found this article about rate limits, and it explains pretty well how many certificates I should request per week per domain. Does this rate limit also count for domain aliases? I mean in the sense that you can request a maximum of x aliases per domain?