You can use a customized mail.yourcompany.com address associated with your domain as the webmail access address or for account setups.
To use it as mail.yourcompany.com in account setups, you need to add/update the CNAME record as follows:
- Record Type: CNAME
- Name: mail.yourcompany.com
- Content: proxy.mxlayer.com
- TTL: 3600