Outbound emails not being sent or sent with delay with the error "status=deferred (delivery temporarily suspended)"Issue You may notice a delay in delivery to certain users or emails not delivered at all. In the logs we can notice the following message: status=deferred (delivery temporarily suspended: host xxxx.net[xxxxxxxxx] refused to talk to me: 550 ErrorReleaseAllCauseServiceNow IP addresses are not allow-listed in the affected customer infrastructure.ResolutionFollow the instructions in the article Enabling email delivery using SPF records to allow SN mail servers to allow-list ServiceNow IPs in your mail servers.