invoicing

Hi All. I've been finding that my invoices get seen more if I actually share the invoice attachment from my own email address rather than send it from quickbooks. Quite often clients seem to not find the QuickBooks invoice ( maybe it goes into their spam?), whereas I've never had a problem when sending an attachment. ( I can do this from my quickbooks app...: ''invoice preview and then share''. 

However the down side of this is that the invoice  does not get marked as 'sent', and therefore i can't mark it as 'paid', after I receive the payment. It stays as ' draft'. 

Has anyone else experienced this , or are their any suggestions? 

Many Thanks