Office 365 mailbox may have multiple SMTP addresses. For outgoing messages Exchange online service always uses the primary SMTP address. For example, John Doe has a mailbox with [email protected] primary SMTP address and [email protected] secondary smtp address. John Doe can easily receive the message addressed both to [email protected] and [email protected], but he cannot send the message as [email protected] because Exchange online rewrites the From address to default one.
ChooseFrom application allows Office 365 users to send a message with any of their own SMTP addresses as the From address.
The application is a cloud service.
We’ve recently released a new feature: sender address rewriting aka Unconditional sender rewriting rules.
Current version: 126.96.36.199
- Set up a connector.
In Office 365, click Admin, then click Exchange to go to the Exchange Admin Center. Next, click mail flow, and click connectors.
Click the plus sign icon to add a new connector. Create the connector named “ToChooseFrom365” with the following parameters:
- Let us know your default and alias addresses.
Send a message to testChoosefrom365(at)ivasoft.com containing the following information:
We’ll send you back an e-mail confirming that you can test the service during a week.
- Open Outlook 365 and create a new mail message. Assuming that your alias address is “[email protected]”, place the follwing to the Subject line:You can add any display name:
- Send the message to any external Internet address you can operate.
- Receive the message you have just sent and make sure the sender address (the From: field) is the same you have set in the Subject line in step #1. Also check that the Subject line contains only “This is a test” phrase.
Client-side applications to cooperate with ChooseFrom 365
- SmartReply for Outlook 2010/2013/2016/2019.
- SelectSender for Office 365 OWA. Compatible with Chrome, Firefox and Edge web browsers.
Q. How to provide a list of addresses/aliases?
A. Use the following format:
Q. I have cancelled my subscription. How do I reroute my emails away from ChooseFrom365 server?
A. In Office 365, click Admin, then click Exchange to go to the Exchange Admin Center. Next, click mail flow, and click connectors. Delete the connector named “ToChooseFrom365”.