Question
Is it possible to automatically select an SSL certificate for securing mail during domain creation?
Answer
Currently, there is no such functionality in Plesk.
If you would like to see this feature in Plesk, please vote for it at Plesk UserVoice portal.
Whilst it is not possible to automatically select an SSL certificate during the domain creation, follow the instruction steps from the below Plesk guide to set the certificate for securing mail for example.com after its creation: