Paul Bell

How to Configure your Nimble to SMTP Relay via Office 365

Blog Post created by Paul Bell on Sep 15, 2015

I've done this for two clients, couldn't find anything on Connect yet, so here are the steps!


Gather your info

  1. Get the relay server name – looks like ""
    1. Login to, click Domains
    2. Click Domain settings (on right)
    3. Save the MX record listed under DNS records
  2. Get your public IP (source of SMTP traffic)
    1. Ask your network admin or just go to


Get to work

  1. Login to with an admin user account
  2. Click Admin->Exchange->Protection
    1. Click Connection Filter
    2. Edit the default filter
      1. Click Connection Filtering
      2. In IP Allow list, add your public IP address
      3. Click Save
  3. On left menu bar, Click Mail Flow
    1. Click Connectors
    2. Click to add a connector
    3. Name it “SMTP Relay From Datacenter” (or something else relevant)
      1. Check to turn it on
      2. Check to retain internal Exchange email headers
    4. Click the to add your IP address
      1. Click Next and save the changes


Set up Nimble

  1. Open Nimble portal (not Infosight)
  2. Click Administration->Alerts and Monitoring->Email Alerts
    1. Set the From: address to be a email address to a valid/licensed Office365 user
    2. Set the To: address to be your email (or a distribution group of responsible adults who love to receive email alerts and properly respond)
    3. Set the SMTP hostname to the relay server name
    4. Set the port to 25
    5. No authentication
    6. Click Save
    7. Click Test
  3. Verify you have an email from your SAN!