Not sure if this is the right place to post this but we are looking for an on-premise alternative solution to the O365 SMTP service which allows for more customizations and granulaity.  Anyone got any recommendations on 3rd party products ?

• Edited by Tech11-EU 22 hours 24 minutes ago

There 1001 SMTP software/appliance out there in the market. It really depends on what customization you need.

Since you post here, I would recommend Exchange 2013 edge transport server as a start.

• Proposed as answer by Winnie LiangMicrosoft contingent staff, Moderator 4 hours 36 minutes ago

Hi,

I dont know if there is any third-party products to achieve it. Generally, we can configure custom mail flow by using connectors for on-premises Exchange. For more information about this, please refer to:

https://technet.microsoft.com/en-us/library/jj723138%28v=exchg.150%29.aspx?f=255&MSPPError=-2147217396

Receive connectors in Exchange 2013

https://technet.microsoft.com/en-us/library/aa996395(v=exchg.150).aspx

Regards,

Not sure if this is the right place to post this but we are looking for an on-premise alternative solution to the O365 SMTP service which allows for more customizations and granulaity.  Anyone got any recommendations on 3rd party products ?

To better target any responses, what is it that is missing from O365 that you require?

Looking at an internal SMTP service to enhance the O365 one.  Some of the things we are looking for are reporting on volume of mail in a usable format (access to logging), blocking by IP, hostnames or IP ranges, configuring the max size of messages accepted, controlling the rate of relayed emails with throttling.  Sure there are others but this for starters. 

• Edited by Tech11-EU 1 hour 57 minutes ago

Correct me if I'm wrong, but isn't that all offered by Office 365 apart from the control of email send throttling?
https://technet.microsoft.com/en-us/library/dn554323%28v=exchg.150%29.aspx