What's the origin of -sends in an email signature?

I’ve just discovered an email record where the writer signed his name as follows:

V/R Firstname Lastname-sends

I’ve never seen this particular type of signature before. I assume V/R is "Very respectfully"^[1], but what is the origin and purpose of appending "-sends" to your name in correspondence?

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^[1] For the purposes of this question I’m not interested in the meaning of V/R