Did you check your certificate?
We had some time ago an issue with one sender, that looked like yours in
the logs. After changing from a self signed certificate to one from
letsencrypt the sender didn't timeout in data anymore. Our certificate
where at that time about two years over end time.
Hi John,
Am 19.10.19 um 21:47 schrieb John Schmerold:
I am using Postfix as a filter, it is protecting end-users on Office
365, Google Apps and a cPanel server.
We are seeing quite a few "Recipient address rejected: Service is
unavailable (try later)" messages in mail.log.
The email will be
