Paubox Email Suite: Getting started
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      2. Paubox Email Suite
      3. Paubox Email Suite: Getting started

      Inbound Security setup for Microsoft Exchange Server

       

      NOTE: Coordinate with the Paubox team for inbound security setup.

      • Paubox team will provide the appropriate mx value 
      • Mail relays must be set on the Paubox side or mail will not be delivered
      • Send your Exchange server's public IP to us so we can configure on our side - send to: support@paubox.com 

      Overview

      What you’ll need:

      1. Trial subscription with Paubox (don't have one? sign up here!)
      2. A static public IP address that sends your organization's mail
      3. Exchange Server: Admin access to your organization's on-prem server
      4. Domain: Admin access to your organization's domain host (for ex. GoDaddy or Cloudflare)
      5. The appropriate mx value for your domain - provided by Paubox during setup

      What you’ll do:

      1. Exchange Server: allow inbound connections from Paubox
      2. Microsoft 365: Create a connector
      3. Domain: Update your domain's mx record

      Questions? Stuck? We’re here for you!  support@paubox.com

      Step-by-step guide

      Part I: Microsoft Exchange inbound routing

      Microsoft Exchange may block the connection from Paubox's inbound mail servers to your email environment. In order to allow Paubox to relay inbound emails to your Exchange server, please follow the instructions below.

      1. Confirm that STARTTLS is running on your Exchange server. 

      2. Configure your firewall to allow incoming connections from this IP range (on port 25): 165.140.171.0/24

      Part II: Domain update - MX record

      1. TXT/SPF record update
        Your domain's TXT/SPF record must include both the static IP of your Exchange server and Paubox:
        For example: v=spf1 ip4:10.1.1.1 include:_spf.paubox.com -all  
        (10.1.1.1 is just a sample value; use your Exchange Server's sending IP instead)
        If there are other IPs or values, leave them - just edit to insert IP & the Paubox include
      2. MX record update
        Update your domain's MX record by editing and replacing the existing value with Paubox's record:
        <appropriate mx value supplied by Paubox team during setup>

       

      Note: if there are multiple MX records, edit the record of the lowest value (usually "10") and replace the existing value with the appropriate Paubox mx value. Save; then delete all other records of type MX. 

      This update will start routing all inbound email for your domain to Paubox when the DNS record change finishes propagating.