Greetings to you

One of my tasks at my job involves handling e-mails and communicating with customers with that fashion. I use a thin form for my e-mails, a brief greeting, and a brief closing, which I have to type out by hand each time. I seem to miss, sometimes, as I just discovered a reply to one of my e-mails in my box, with my original e-mail in the reply, stating the following (name changed):

"Dar Amanda,"

Normally I notice things when I proofread before sending, so I don't know how I missed this. I'm not sure what 'dar' in this case would stand for, but Wikipedia's first suggestion is "Daughters of the American Revolution".

At least she didn't go Grammar Nazi on me for it.