结束时不必写“诚挚的祝福”或“谨致问候”之类的结束标识语。

No closing remark such as' Sincerely 'or' Best regards' is necessary.

youdao

你还可以说“谨致问候”，但因为你不知道收信人的名字，而且显然也没有见过他们，所以我认为这个结尾不太合适。

You could also say, "Best regards", but I don't think that would be appropriate because you don't have the name and obviously haven't met them.

youdao

谨致节日问候！

With greeting in this holiday season.

youdao

谨致节日问候！

With greeting in this holiday season.

youdao