Mailster has some requirements to work correctly on your Joomla page, please take a minute and check them.

	Mailster (Free, Essential, Business, Ultimate)
Joomla	Version 3.0 - 3.4 (Mailster 1.1+) Version 3.5 - 3.7 (Mailster 1.3.2+) Version 3.8 (Mailster 1.4+) Version 3.9 (Mailster 1.5+) Version 4.0 - 4.4 (Mailster 1.7+) Version 5.0+ (Mailster 1.8+)
PHP	Version 5.6+
	PHP IMAP extension installed & enabled PHP iconv function or mbstring extension
MySQL	Version 5.0.15+

If you are unsure whether your server fulfills the requirements make sure to find out before purchasing as we do not issue refunds when your server does not meet the system requirements.

A good way to check if your server meets the requirements is to install the free edition of Mailster - when it is working the other product editions will work, too.