Grating? Really? Would "hello@domain.com" have any better connotation? I use funny greetings like "howdy" in regular conversation because it has the effect of disarming people. You can often do the same thing with an overly formal greeting "Good Day, Mr. Jones" - people can't help but crack a smile. So I'm curious as a non-American (non-native English speaker?) what you would find an actually welcoming, non-trite greeting? "Howdy" is an old, informal rural greeting found everywhere in the US, somewhat like what I suppose "g'day" is in Australia. Would you find "g'day" grating as well?