I am getting bounces from people I have written to for years.?

Question

I have never had bounced emails before, but within the last week or so, I have had at least 4. All are people I have written to for many years.

Answer 1

are they all using the same mail provider? bounces coming back often have a reason for it, did you see a reason? bouncing can be a server issue, and may be that's what it is- can happen at any time, to any one