I am being told by our clients that they aren’t receiving our invoices? This happened once before but all of a sudden resolved itself, but it is now happening with another client. They got the first invoice, but haven’t received the last 3 we have sent them?
This is likely to be down to the way your emails are sent. I can see you’re using your own email address to send them from, but not your own SMTP servers, which can see the message marked as spam.