Sending MMS to my email address

I sent a few pictures as an MMS to my email address the other day and lots of different random subject titles came up, I took a screen grab of some of them. Others have included "Hahahahahahaha : )" and "Kenny, weve accidently replaced ur hear".

Anyone know why or how this is possible? I have tried searching on Google with no anwers. If its just a thing apple have done then I dont find this very professional, as I use my iPhone for work.

Thanks!!