Email APIs That Support Receiving: Inbound Workflows Compared

This is a map of integration models, not a price ranking. Verify current limits, setup requirements and contracts for the workload being evaluated.

SES can receive email for configured domains and apply receipt rules, including delivery to other AWS services. Receiving availability depends on region. Evaluate domain setup, IAM, storage, parsing and application processing together; receiving infrastructure alone does not define an agent’s task state or conversation ownership.

SendGrid provides an Inbound Parse webhook for receiving email as application data. Compare that intake model with the mailbox, message and thread model you want the agent to use. Receiving support exists; the question is how much conversation state your application needs to manage.

Robotomail provides a dedicated mailbox identity and APIs for sending, receiving and retrieving its conversation context. The application owns the agent and its rules, while the mailbox stays available as the address people reply to.

For an existing SendGrid application, inventory sender identities, recipient preferences, templates, attachments, inbound parsing and delivery handling before making changes. Start with one Robotomail mailbox and a bounded workflow rather than assuming every integration field maps directly.

Mailgun can receive, route and forward mail to an HTTP endpoint. Its route action posts parsed fields and uses multipart form data when attachments are included. It should not be described as incapable of inbound email.

Robotomail exposes mailboxes and their messages and threads as the integration starting point. Compare that object model with the route-based intake already in your application. Work out where conversation history lives and how each incoming address maps to an agent.

When replacing an inbound route, account for payload differences, signature verification, retries, attachment retrieval and historical data. A changed webhook URL alone is not a complete migration. Test before changing domain routing.

Postmark accepts mail at its inbound addresses or forwarding domain and posts parsed data to a configured webhook. Evaluate the message, header and attachment fields and how the application correlates incoming replies to its tasks. Keep processing state and action authorization in the application.

MailerSend documents an Inbound Routing API for managing routes, including webhook forwarding. Compare its domain and route model with the mailbox identity your application needs. Test payload handling, duplicates, reply routing and the current plan’s constraints before changing an integration.

Cloudflare exposes email routing and Worker-based handling. Determine which receiving, processing and sending features your selected product configuration supports. Build an explicit plan for message persistence, conversation context, permissions and failure recovery; a handler by itself is not a complete agent workflow.

CloudMailin provides an email-to-HTTP integration. Examine the incoming format, attachment handling, delivery retries and how the application will store and retrieve conversation context. Connect outbound replies and business-state tracking explicitly instead of assuming an incoming webhook supplies the whole workflow.

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.

The Gmail API accesses a Gmail mailbox. Creating or administering a Workspace user is a separate account-management operation. An integration that needs a person’s existing address and historical mail has a different requirement from provisioning a fresh agent identity.

Robotomail supplies new mailboxes through its API. Your application can keep an agent’s conversations distinct and scope its key to the required mailboxes. It does not automatically connect to or import an existing Gmail account.

Define the required history and permissions before migrating. If staff mail should remain on the existing provider, a dedicated agent subdomain can have its own routing. Changing MX records is a delivery change, not a historical mailbox import.

Count active mailboxes, outgoing and incoming messages, storage, domains and peak usage. Include the work needed for retries, monitoring and handoffs. Check current Robotomail pricing and the applicable terms for any evaluated service.

A successful request is not a guarantee of inbox placement. Monitor delivery, bounces and complaints separately from replies or completed business actions. Keep suppressions and notification preferences in the workflow.

When migrating, map identifiers, credentials and active conversations before changing domain routing. A new mailbox does not copy an old account’s history. Test one workflow, record the result and keep a rollback path.