Mail not working [URGENT]

[mindverge]

3 hours ago, mindverge said:

I installed using Softaculous. Used tommy.heliohost.org as SMTP and IMAP server keeping everything else same. Now, how do I create new email accounts? 

I want to create email ids like name@my-domain.com but access the webmail via email.my-domain.com. Is this possible with your hosting, please?
@wolstech

Edited 3 hours ago by mindverge
tagged the admin hoping for a faster response.

[wolstech]

You can do that in Plesk. Click your domain, then the mail tab, then mail accounts. Click the + to add them.

[mindverge]

1 hour ago, wolstech said:

You can do that in Plesk. Click your domain, then the mail tab, then mail accounts. Click the + to add them.

Yes but when I am doing for email.my-domain.com then email ids are becoming name@email.my-domain.com instead of name@my-domain.com. 
I need name@my-domain.com and to host the roundcube at email.my-domain.com. Is that possible, please?