Remove expired records from the validations table

[vohmar]

successfully validated email records are valid for 1 year after that period of time the email address should be revalidated. On revalidating the record old expired records should be removed from the validations table.

this could be done by either the same validation method when expired validation is detected or by a separate method

Test:

• run email validation at mx validation level
• choose any successfully validated record for further monitoring
• run email validation at mx level - check that there is no now validation record created for the chosen email address
• change validity period setting to 1 minute
• run email validation at mx level - check that there is now new validation record for the chosen email and the old record is deleted