XXX XXX (XXX@YYYY.com)
SN1NAM01FT025.mail.protection. gave this error:
Access denied, bad outbound sender AS(41000001) [SN1NAM01FT025.eop-nam01.prod]
Hello
I am a GMAIL user on private domain sending email to a outlook.com user on private domain and continuously get these errors when sending email. These domains are for large multi national companies so changing email addresses is not possible.
The sending email domain has SPF and DKIM records for authentication and is not listed in any SPAM database. We have checked absolutely everything on our end but cannot find an issue.
I have been trough the process with Outlook.com Deliver-ability Support to check the IP's of G Mail servers are not blocked - and as expected they are not.
I am really looking for some help on how to resolve this issue or even someone to contact.
Thank you
Craig