Hello Everyone:
I'll try to explain as much as I could on what is our problem with Sophos Central Email Gateway. We just recently subscribed to Cloud-Based Sophos Email Gateway. Here is what we are trying to do:
Inbound Email = WORKING GREAT:
Internet Email Sender > Sophos Central Email Gateway > SF XG310 > Exchange 2010
Outbound Email = NOT WORKING:
Exchange 2010 > SF XG310 > Sophos Central > Internet Recipient
ERROR Received:
Delivery has failed to these recipients or groups:
user@externalemaildomain.com
Your message wasn't delivered due to a permission or security issue. It may have been rejected by a moderator, the address may only accept e-mail from certain senders, or another restriction may be preventing delivery.
The following organization rejected your message: relay-us-west-2.prod.hydra.sophos.com.
Diagnostic information for administrators:
Generating server: OUREXCHANGE2010SERVER.ourdomain.com
user@externalemaildomain.com
relay-us-west-2.prod.hydra.sophos.com #550 5.7.1 Command rejected ##
Here's our configuration.
Sophos Central Email Gateway:
Uses AD Sync
Domain > Inbound Only > Inbound Destination > Mail Host > External IP Address of our Mail Host with Port 25
GoDaddy MX Record:
mx-01-us-west-2.prod.hydra.sophos.com
mx-02-us-west-2.prod.hydra.sophos.com
SF XG 310:
MTA Legacy Mode
Inbound Business Rule:
WAN - Sophos Delivery IPs (52.41.236.76 and 50.112.39.248)
Destination - External Exchange 2010 IP Address
Services - SMTP(S)
Protected Server - Internal Exchange 2010 IP Address
Protected Zone: LAN
SF XG 310:
Outbound Rule:
Source - LAN - Internal Exchange 2010 Internal IP Address
Destination Zone - WAN - Sophos Delivery IPs (52.41.236.76 and 50.112.39.248)
Services - SMTP(S)
What are we missing?
Thank you in advance for all your help.
Baldwin
Added tags
[edited by: Raphael Alganes at 9:21 AM (GMT -7) on 11 May 2023]
