What is and When to use a smart host?
A smart host is an email server through which other servers, if they are configured to use it, can send their outbound mail through instead of sending it directly from their IP address. Note also that the smart host server can hide your mail server’s IP address from the public.
So why do we use it?
Most of the reason that we need to use a Smart Host is to prevent the mail server Ip address from having a bad reputation and mail would be blocked by most mail servers.
Configuring Smart host:
- Follow these steps to enable relaying on modusCloud.
2- Click the Features tab.
3- Enable Outbound Relaying and click Save.
4- Click on the Domains tab.
5- Click on the button Manage Hosted Services or New sending servers (if you are using Exchange on premise)
6- Click on the slider of Office 365 or enter your exchange IP address (if you chose New sending servers in STEP 5)
7- click Save.
Note: When this (Manage hosted services) is enabled modusCloud will automatically manage the IP ranges of Office 365 published by Microsoft. Updates are performed daily.
In this Document we will focus on exchange 2016 to create a smart host.
. open the ‘Exchange Administration Center’ EAC
. Login to the EAC as administrator
. in the left menu select ‘Mail Flow’
. Select ‘Send connectors’
. Click ‘New’ to add a new connector
. Enter a name of your choice, i.e. AuthSmtp
. Select ‘Internet (For example, to send internet mail)
. click Next
. Click ‘Route mail through smart hosts’
. Click ‘Add’ to add the new server that will act as a smart host
. Click ‘Next’
. Enter the Smart Host IP address
. Click ‘Save’
Note: if you are hosted in
. EU make sure to use outbound-eu1.ppe-hosted.com
. US make sure to use outbound-us1.ppe-hosted.com
. Notice the info you entered in the smart host window
. Click ‘None’ if no Authentication is required otherwise ‘Basic authentication’ (screen shot below)
. Do nothing for ‘Exchange server authentication’
. Do nothing for ‘Externally secured (for example, with IPSec)
. click ‘Add’ to all the hosts that are allowed to send through this connector
. Select Type ‘SMTP’
. Enter ‘*’ in the FQSN field
. Enter 1 in the ‘Cost’ field
. Click ‘Save’
. Click ‘Add’ and enter permitted source server
. Click ‘Finish’
. Click the appropriate server from the list
. Click ‘Add’
. Click ‘OK’
. the Click ‘Finish’
. Display of the sent connector just create that will be used to send outbound mail.