Well I used Quform (a premium, paid plugin) before I switched to Ninja Forms (a well-known, free plugin) and the same problem occurred. Which lead me to believe that the 'contact forms' are not the issue. The contact forms/plugins work for the most part, but there is always 1 or 2 submissions a week that aren't received in my friend's email (but they can be found in the submissions section of the wordpress plugin). This causes both him and customers to get frustrated.
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