Access Webmail via IP address. For example 203.0.113.2/webmail.
So it is not needed to have a domain resolving to any DNS in order to access the webmail.
Thank you for your input! We will consider this functionality in upcoming releases if it will be popular.
Everyone, please continue voting for this feature if you consider it important.
Also wish to have this feature as due to requirements, sometimes our users will need to access webmail through ip e.g https://126.96.36.199:2096 (something like cpanel) instead of the usual webmail.yourdomain.com.
Looking forward to have this feature implemented.