Emails not delivering

[#1]

Hi

Over the last couple of months, I've occasionally been getting "undeliverable" responses to emails, in the format:

Your message did not reach some or all of the intended recipients.

      Subject:     RE: XXXXXXXX

      Sent:  08/04/2026 15:59

The following recipient(s) cannot be reached:

      'XXXXXXXX' on 08/04/2026 15:59

            Server error: ’452 <xxxxxx@xxxxx> recipient rejected - too many recipient in last hour’

If I wait a while and resend it, it goes through fine. They've been to different recipients using. What's going on?

John

[#2]

@John_Hull  This error has been going on for months, possibly not all the time but it comes and goes. There is a very long thread about it ....

Too many recipients

Nothing you can do to fix it. Plusnet have tried but it seems to come back again.

[#3]

Thanks for the response. It doesn't happen too often, but it's quite irritating when it does.