My startup never uses no-reply and someone reads pretty much every reply.
But note that this is not zero cost. The time your support staff spends deleting out of office replies and spam is time they aren't helping real people.
It's trivial to filter out of office messages if you use a decent email program. The false positive rate should be as close to zero as you can get.
Reading every feedback email from every real user teaches you how to create better products. If you make it clear users can provide feedback, there's an opportunity from them.
I ask every single real person who leaves my service why they left, which translates to about 12 emails from me per week. Most of the time, the feedback isn't actionable, but 2-3 of every 50 emails translate to something I can use to make my product better.
Reading every feedback email from every real user teaches you how to create better products. If you make it clear users can provide feedback, there's an opportunity from them.
I ask every single real person who leaves my service why they left, which translates to about 12 emails from me per week. Most of the time, the feedback isn't actionable, but 2-3 of every 50 emails translate to something I can use to make my product better.