The most important thing is that I can send emails to my customers without having them login into our system - it's just an email! They don't have to download any software or anything like this as they are already logged onto Outlook etc so all we need from there point of view is for someone at hubub (or whoever) sends me back confirmation via text message saying "this has been sent". It would be great if you could also add some sort of notification when your customer replies but other than those two things everything else works perfectly well.
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