Acelle Email Marketing Web Application 4.0.26-p87

* Fixed SSL issue for bounce handler
* Fixed bounce handler does not work correctly for certain type of IMAP servers
* Changed sending campaign can be deleted
* Added full support for SendGrid (web API & SMTP)

* Added: support Zapier integration
* Added: retry failed deliveries
* Added: system error notification
* Fixed: open/click tracking not working correctly
* Fixed: incorrect user IP detection

* Added: support debounce.io email verification service
* Added: compatibility with open_basedir
* Added: support localmail.io verification service
* Added: support verifyre.co verification service
* Fixed: memory outage issue with GeoIP
* Fixed: orphan administrator accounts not loading
* Fixed: no longer use socket_create function
* Fixed: verify sender identity against AWS
* Fixed: SSL issue with email verification