You have control of most functions that are available in the webmail interface https://imail.netsonic.net when you use an email client.
Client Email-based Operations Information:
1.Get blocked email reports and release functions at any time.
a.Send an email to blockedmail@yourdomain.com
2.Whitelist an email address.
a.Send an email to white@yourdomain.com
b.Enter only the email address you wish to whitelist in the body. One email address per line.
3.Blacklist an email address. See #4b below..
a.Send an email to black@yourdomain.com
b.Enter only the email address you wish to blacklist in the body. One email address per line.
c.Remove a blacklisted address by sending an email to notblack@yourdomain.com and enter only the exact email address you wish to remove from the blacklist in the body.
4.Report an email as spam.
a.Forward the email to addspam@yourdomain.com
b.Users should be encouraged to send spam emails this address rather than blacklisting.
5.Report an email as notspam.
a.Forward the email to notspam@yourdomain.com