Mailsphere Notifications Rejected

If you find that Notifications from Mailsphere are being rejected due to 554 5.1.0 Sender denied we recommend running the following Exchange shell script:

$list = (Get-SenderIdConfig).BypassedSenderDomains
Set-SenderIDConfig -BypassedSenderDomains $list

This script will add the domain to the bypassed senders list which will prevent the notifications sender address from being accidentally blocked by a user in Outlook.