Though Open Mbox does provide free email service, we also provide a paid plan which some users might have interests in. Here are the function comparison of free plan vs premium plan.

Function Free Plan Premium Plan
Email Address user@[openmbox or] [email protected]
Disk Quota 350MB 3GB
Sending Rate 5 mails by minute, 50 mails by day no limits (by webmail)
Alias none 5 email aliases
Multi Accounts none yes
Multi Identities none yes
Webmail Free Webmail Premium Webmail
Support Time 48h 24h
Docs Help (HTML) FAQ (PDF)
Price free $12/year

If you are interested in booking a premium plan, please contact me.