Forum Discussion
Can't send any emails from Exchange online to outlook.com
HotCakeX are you a global or exchange admin in Office 365? You could be sending the email via another provided and then back to Exchange. Either that or Microsoft are blocking one of their own IPs which would be unusual.
is it Microsoft's IPs or are they blocking my IP address?
HotCakeX OK yes so you are global admin. I assume no one has created any send connectors in Exchange? Login to https://outlook.office.com/ecp, click on Mail flow, connectors and just see if you have anything in there. If not, then email is just going straight out from Exchange Online, so yes it would seem that outlook.com is blocking one of these IP addresses (possibly because another customer has been abusing the service).
I would raise a ticket with O365 support for this.
CloudHal wrote:HotCakeX OK yes so you are global admin. I assume no one has created any send connectors in Exchange? Login to https://outlook.office.com/ecp, click on Mail flow, connectors and just see if you have anything in there. If not, then email is just going straight out from Exchange Online, so yes it would seem that outlook.com is blocking one of these IP addresses (possibly because another customer has been abusing the service).
I would raise a ticket with O365 support for this.
Thank you, so here is what i got
about IP addresses, you mean that even if I use VPN or connect to Outlook client from a different IP address in a different country, i won't still be able to send emails because the problem is from Microsoft's IP address? is there any way to find that particular IP address?
- You can check header for X -Forefront-Antispam-Report or X-Forefront-Antispam-Report-Untrusted and check the value of SCL to know if was marked as spam when it left O365.
If it was marked as spam then your emails are being routed through High Risk Delivery Pool and if they are then it's best to open a support request with MS.
DeepakRandhawa wrote:
You can check header for X -Forefront-Antispam-Report or X-Forefront-Antispam-Report-Untrusted and check the value of SCL to know if was marked as spam when it left O365.
If it was marked as spam then your emails are being routed through High Risk Delivery Pool and if they are then it's best to open a support request with MS.should i check this in the email I send to my @outlook.com domain or the email i receive saying it was marked as spam?
- this information should be available in NDR message
