In order to sigh up for this service you must have registered domain.
You will be asked to use your domain during registration for your
mailboxes. After registration completed your will be able to create
emails for your domain.
You can create up to 10 mailboxes and if you need additional mailboxes for your domain you can open support ticked and your limit will be lifted.
Refer to following KnowlageBase article for more information
Ones you signed up for our services you will need to make sure that your MX record is configured correctly.
Mail servers send and receive email messages on the Internet. MX (Mail Exchanger) records specify and prioritize the incoming mail servers that receive email messages sent to your domain name.In order for tekyhost.com to receive mail for your domain you will need to set MX record to point to our server mail22.tekyhost.com. Below is example record for contoso.comcontoso.com IN MX mail22.tekyhost.comIf you need additional information and guidance please contact our support at email@example.com
Refer to this KnowlageBase article on How to add your mailbox to smartphone
Zimbra web client is a full-featured messaging and collaboration application that offers reliable, email, address books, calendaring, task lists, and Web document authoring capabilities.
Ones you sign up for your FREE mailbox you will be able to access it using following link
For username you will need to provide your SMTP address and password will be in the Email you received after completing subscription.