Overview
These are the technical instructions for removing Paubox Outbound Security and/or Inbound Security for your on-premise Exchange server.
Please be sure to let us know you are canceling your Paubox subscription by sending an email to support@paubox.com - and let us know if we can help.
Follow these steps to return your email to its original routing.
Part I: Your domain - update your records
- Log in to your Domain Host
- Click on the Control Panel (may also be called DNS Zone Editor, or just DNS)
- Find the record of type TXT with a value similar to:
v=spf1 ip4:10.1.1.1 include:_spf.paubox.com -all - Edit the record and remove only "include:_spf.paubox.com" from the value (leaving the rest of the record in place)
- Click Save
Part II: Exchange Server - remove smarthost
There are many different versions of Exchange; steps may be different.
- Go to your Exchange Admin Center
- Click mail flow
- Click on send connectors
- Remove the smarthost that directs mail to outbound.paubox.com
That's it! Thanks for using Paubox - please feel free to reach out to us with any questions, or if you'd like to re-visit Paubox down the road: support@paubox.com
Removing Inbound Security (if applicable)
Inbound Security Part I: Your domain - update your MX record
- Log in to your Domain Host
- Click on the Control Panel (may also be called DNS Zone Editor, or just DNS)
- Find the record of type MX with a value of: mx1.paubox.com or mx.paubox.com
- Edit that MX record - leave type MX; priority 1; change the value to direct mail to your Exchange server
Inbound Security Part II: Exchange - remove inbound IPs from firewall
After changing your MX record, wait for the new value to fully propagate. Once inbound traffic has stopped arriving via Paubox, it is safe to remove these IPs from your firewall:
- 54.69.73.61
- 54.69.65.158
- 54.69.172.93
... or these CIDR ranges, if your setup included CIDR ranges rather than specific IPs:
- 50.112.144.0/255.255.255.0
- 54.69.0.0/255.255.0.0