Robotomail vs Outlook / Microsoft Graph

Microsoft Graph exposes mail resources under its permission model. Personal and organizational accounts, delegated access and application access have different requirements. Automation is not accurately described as universally prohibited; the relevant authorization and account policies need to be evaluated.

Robotomail creates a dedicated mailbox identity for an agent or workflow. It uses its own message and thread APIs and does not automatically operate inside an existing Outlook account. Shared-mailbox Sent Items behavior is a Microsoft account configuration issue, not a Robotomail feature.

List the workflow’s identity, history and approval requirements. For a new agent address, test Robotomail’s provisioning and conversation loop. For a migration, plan routing and existing conversations explicitly rather than treating a new mailbox as a copy of the old account.

Test the actual send-and-reply loop, including file handling and an interrupted processing run. Inspect message and thread identifiers, not just a successful send response. A delivery event reports recipient-server acceptance; it does not guarantee inbox placement or a human read.

Verify webhook signatures using each service’s documented method and make application processing idempotent. Treat incoming mail and attachments as untrusted input. A recognized sender, valid signature or existing thread does not authorize every action requested in the message.

Confirm required security controls, contracts, retention and any certification directly before purchase. The availability of an API key or encryption does not establish a specific compliance guarantee.

Model active mailboxes, monthly sends, incoming volume, storage, domains and peak traffic. Include the application work needed for retries, monitoring and human handoff. Use current plan terms; introductory allowances should not stand in for the expected production workload.

Create a test mailbox, map credentials and identifiers, send and receive a representative message, and check how a reply appears in the receiving client. Decide what happens to historical messages before switching domain routing. Keep an application-side task ledger and a rollback path.

Reviewed 18 September 2026 using the providers’ public API documentation. Exact prices, limits and contractual commitments can change and are intentionally not asserted as permanent feature differences.