Problem with Sharing by Email / Inviting Friends by Email

Hello,

I have two issues.

1. When a user is logged in and wants to share a post, the user clicks on "Social Share." On my installation, the user can share through social media such as Facebook, Twitter, etc. That works. But when the user wants to share by adding recipients' email addresses, it does not work. The system shows that the message has been sent, but the people do not receive any emails. What is the problem?

2. There is also a problem with the "Invite Friends" option. If a user wants to invite his friends to my website, he clicks on the icon on the menu and under "Account", he selects "Invite Friends". The user fills the form with the email addresses and message and sends. The system shows that the invitation has been sent. But the people do not receive any emails.

So, does the messaging plugin work or do I need to activate it somewhere?

Just so you know, when somebody signs up, a message is sent to the admin by email to activate the account. When somebody creates a new group or page, the system sends a message to the admin to approve. When the system is setup for self authentication by users, the system sends email to the user to activate their accounts.

This means that the messaging system is working. But what is not working is sharing by email or inviting friends to the website by email.

What should I do?

Thanks.

Chidi