There is some difference between British and American usage. See here. Yes, many thanks is perfectly proper, grammatical, standard English. It is appropriate to use wherever …
I have seen many many people say "Thanks so much". I believe what they really mean is "Thank you so much". Searching "Thanks so much" in this website gives 177 results. But …
Commenting 12 years later… From the perspective of descriptive linguistics, I would say that "Thanks John" is used by native speakers, moreso "Thanks John!" When you …
Much thanks means the same thing as many thanks, but many thanks is the standard form of this phrase, and much thanks is probably merely a corruption of the concept. …
2. Either is fine. The "rules" say that the name of the person you're addressing should be set off with a comma, but that comes across as overly formal in a brief email or text …
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