Mail Routing for Microsoft 365 cross tenant Migration

Complete your cross tenant migration and transfer your domain names between your tenants without downtimes.

Mail Routing Overview

When to use Mail Routing

After a cutover mail migration between Microsoft 365 tenants, moving domain names can take up to 48 hours. To avoid non-delivery reports for any emails sent to those domains, Cloudiway’s platform ensures all incoming mail is routed to the intended user regardless of the status of the domain.

incoming mail
SMTP domain

Features

Detach your SMTP domain from the source tenant and reattach it to the target tenant without downtime. Mails are routed to the correct target mailboxes with zero downtime during the manipulation.

Benefits

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Zero downtime

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Nothing to install

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Transparent Migration

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All in one solution for your Tenant to Tenant Migration

MailRouting Frequently Asked Questions

MailRouting is a CloudService that you can use during a Microsoft 365 Cross Tenant migration. It is used to rewrite incoming mails and route them automatically to the target tenant.

The mailrouting service is a Postfix infrastructure hosted and operated by Cloudiway. At the end of your cross tenant migraition, when you are ready to detach and transfer your domain, you should point the MX record of your domain to the Cloudiway service. Your mails will be automatically redirected and delivered to the technical domain name of your target tenant. No mails are delivered anymore to the source and you can safely detach your doaiun name.

You should use the mailrouting service during your Microsoft 365 cross tenant migration for transfering your domain name from the source tenant to the target tenant.

You shouldn't use the mailrouting service for more than 48 hours. It is usually sufficient to detach and reattach your domain. If you plan to route mail during several weeks while you are performing your migration, you should use instead the forwarders functionality: Mail Forwarders

It is a Postfix server. Postfix is largely used on internet to route mails.

This article explains the difference between forwarders and Mail Routing:Forrwarding-vs-mail-routing/