Plusnet email blocked by Proofpoint (iCloud)

[#1]

Sending email using Plusnet's email servers to an iCloud email account resulted in a bounce due to being blocked by Proofpoint:

Message in bounced email:

Reporting-MTA: dns; avasout01 [84.93.230.227]
Diagnostic-Code: smtp; 550 5.7.0 Blocked - see https://support.proofpoint.com/dnsbl-lookup.cgi?ip=84.93.230.227

Following the link above, message from Proofpoint website:

Dynamic Reputation IP Lookup
This IP address is currently blocked.
IP Address: 84.93.230.227
Query Time: 2020-05-14 09:02:52 UTC

[#2 · Accepted solution]

@j123 Looks like it was a transient problem. It's not blocked now

[#3]

Yep, seems to be working now.

Thanks.