I can't get this to work. When I test connection I get

Hi,

I can't get this to work.

When I test connection I get an error box saying "Please check your outgoing email settings...The following From email address failed." But I think I have it set up correctly.

In addition, when I go to Create Newsletter
I get an error saying:

Fatal error: Call to undefined function wp_clean_themes_cache() in /homepages/16/d379206873/htdocs/WordPress 1and1 OffLicenceForSale.com/wp-content/plugins/e-newsletter/email-newsletter-files/class.functions.php on line 1262

By the way since I paid for my subscription, this is the THIRD WMPUDev plugin I have used, the third not to work?

Regards,

Mike