very important, please do it.

Absolutely vital requirement. I thought the letsencrypt wildcard certificate would solve this problem. did not realise that Plesk would not implement it with priority - very disappointed

very important, please.

very important feature

yes. Important feature.

ALL our client with Outlook 2016 And new IOS have problems beacause this feature is missing

Plesk do not respect the best pratice for a good email deliverability best, the develoopers are probably lazy to make this changes ?

Plesk is an old company already and maybe started to think that's not necessary to follow thebest pratice and new options.

It must be fixed as soon as possible, as a priority task, without a good email deliverability and respect best practices, Plesk doesn't make sense to be used.

Google recently forced their users with restricted SSL for POPS/IMAPS, this is no longer a feature. it is a requirement. even if you secure your customer domain with a wildcard, you'll get the CT error.
Plesk needs a virtual mail server sharing the same IP as virtual hosts do.

vote also here, the new office 365 only configurable via email name and after that i get certifacte errors...

Customers with Apple devices have a lot of cert problems, this would be the fix.

Would be great to include mail.domain.xyz to the Lets Encrypt certificates, like webmail, by default and use this certificate in the mailserver config.

Apple devices are now rejecting certificate

Really needed

Using
mail.cistomer1.tdl
mail.cistomer2.tdl
mail.cistomer3.tdl
mail.cistomer4.tdl

Instead of
sameforall.server.tld

Would be a serious good improvement

Definitely needed!

I don't know if this is the right Place, but for those who keep searching for that feature "AdminAhead" has a nice Plugin for this which gets the job done (Again no Advertisment here, just wanted to share). I really really hope it won't take long to integrate this in Plesk!

Really missing it

Yes, i don't know why this is not implemented yet!

Great. But keep an eye on other suggestions here, regarding similar requests, referring to develop Let´s Encrypt Extension to be able to secure customer´s mail domains (and without being forced to have web service enabled only for this).

We need it !

Definitely needed! As a hosting provider it's frustrating that we can not provide the appropriate e-mail service to our clients (we need email support for multiple customer-domains on a single Server / 1 IP-Adress incl. SSL)

Please add this enhancement to Plesk! I would be a great improvement.