What is the limitation of the masking feature in Vtiger CRM?

• If any email field is masked, it will not display the Masking feature in the following: 
  • Compose an email
  • Inbox email 
  • Cases. 
• Following actions are restricted to avoid leaking masked email addresses.
  • Reply
  • Reply All
  • Forward
• Masking is enabled for only the following field types:
  • Email
  • Phone
  • Text
• The Details tab from the Cases module allows you to see the email address in each email thread but does not allow you to see the email address in the CC field.
• Email validation will not be performed when masking is enabled.
• External applications that will not follow the masked settings are:
  • Customer Portal
  • Partner Portal
• You must restrict searching for masked fields in the following areas:
  • List view
  • Related List view
  • Global Search
  • Global Advanced search
  • Compose email window in Inbox and other places.
  • Invitees in Events records
• Numbers from phone calls are masked and then decoded for the customer.