How about ask@domain? It clearly states that you're open to answer any kind of question from customers and/or partners, and it's neither too formal (like sales@

How about ask@domain? It clearly states that you're open to answer any kind of question from customers and/or partners, and it's neither too formal (like sales@, support@, accounting@) nor hipster-casual (say, hello@, howdy@, yourfriends@ and so on). Then you might also want to use team@domain for announcements but that's it.