I am getting SPAM to my help desk

Make sure your are using the latest version of HESK!
 

Enable anti-SPAM image in HESK Settings.

Still getting SPAM?
Try disabling Anti-SPAM image in HESK settings and using a good "Anti-SPAM question". Don't use a default anti-SPAM question, try writing a unique one for your website yourself.

Still getting SPAM?
Try enabling ReCaptcha in HESK settings (or install HESK ReCaptcha plugin for HESK version 2.4)

Still getting SPAM?
If you have E-mail piping or POP3 fetching enabled try disabling them. HESK doesn't filter incoming mail for SPAM, your server should do that.