Emailing payslips is very easy to set up.
On the employee details (Setup -> Employees, select the employee and click Edit, then look at the Personal -> Details tab) enter the employee's email address and tick "Email Payslips". Then when you finalise a pay for this employee, the payslip will be automatically emailled to the employee's email address.
Multiple email addresses can be specified for an employee, enter each email address separated by a semi-colon ( ; ) on the employee's Email Address field.
The Company Settings email address will be used for the 'Reply To' address on the payslip email. If multiple addresses have been entered on the Company Settings, only the first address will be used.
You can customise the appearance of the payslip email on Setup -> Company -> Payslip.