incoming emails being rejected 550 #5.1.0 Address rejected

[AnnaB1]

have confirmed by testing that incoming gmail emails with attachments are being rejected.  The email account rejecting the emails is dixogood@tpg.com.au.  are you able to assist/fix this.

[david64]

Hi @AnnaB1 . Send email to postmaster@tpg.com.au detailing your problem. Include date/time of occurrence and sender.