Can you let us know when the messages were sent?
Good morning. Many of the messages were sent on Sunday, throughout the day, and were direct replies to
@wrenkins PMs, not newly composed ones. They don't appear in my sent items as I didn't tick the keep copy option.
If it helps, the messages contained details of postage rates.
Things seem to be working now, but there's no way for us to be 100% certain.