Hi,

When sending mail from the domain riconlalo.com (hosted by Google/Gsuite/Gmail), it is being rejected by Shaw.

Here is the error:
Bounced
Google tried to deliver your message, but it was rejected by the server for the recipient domain shaw.ca by shw-central.mx.a.cloudfilter.net. [15.222.199.59]. The error that the other server returned was: 552 5.2.0 sender rejected AUP#SNDR

Can you please help us solve this, we need to receive mail from riconlalo.com.

Thanks in advance,