say 'Dear' to me? I swear, every Indian freelancer I get... They call me dear.. ? Is that like an appropriate thing to do?
I.E. "We wil finish it on time dear", "thank you dear"
I've already given an explanation about the usage of the word "Dear" in the salutation. Now, from the Indian perspective, I will try to explain why people around this region use "dear" when ending a sentence/letter...
In India, it is customary to say some respectful word at the end of a sentence or conversation... for example, we usually say, "
ji bhai-saheb" (Hindi for brother -- related or unrelated, or to any elderly person), "behen-ji" (sister...), "
ji" or "haan-ji" (a suffix which denotes 'respect', or which also denotes that "it'll be done" / OK, "understood", "will do", etc). There are plenty of such terms in all Indian languages which are used to show respect to each other in any conversation and these words are used in offices, schools, esp. over telephonic conversations, over the "virtual" conversations where both parties do not see facial expressions and rely on written/spoken words alone to understand more (intent + meaning); and anywhere else without being interpreted as grammatically wrong.
It is in that context these words are routinely used by Indians when they chat/mail/talk/etc. The "dear" or "Sir" at the end of a sentence or a letter as mentioned above, or it can simply be understood/interpreted like the word "OK" / dude / "thanks", etc. to end the session with some kind of sincere/earnest/polite pleasantry/remark.
HTH.
It is also something similar to (not entirely) putting a smiley (or "lol", etc.) at the end of a written sentence to denote that (e.g.): "... my intention was not to hurt anybody's feelings here

though the words used were a bit acidic..."
So the next time someone writes a email ending with "dear", do not see / visualize a future session in bed with him/her

. j/k