Email Service Provider,:ref:`amazon-ses-backend`,:ref:`brevo-backend`,:ref:`mailersend-backend`,:ref:`mailgun-backend`,:ref:`mailjet-backend`,:ref:`mandrill-backend`,:ref:`postal-backend`,:ref:`postmark-backend`,:ref:`resend-backend`,:ref:`sendgrid-backend`,:ref:`sparkpost-backend`,:ref:`unisender-go-backend`
.. rubric:: :ref:`Anymail send options <anymail-send-options>`,,,,,,,,,,,,
:attr:`~AnymailMessage.envelope_sender`,Yes,No,No,Domain only,Yes,Domain only,Yes,No,No,No,Yes,No
:attr:`~AnymailMessage.merge_headers`,Yes*,Yes,No,Yes,Yes,No,No,Yes,Yes,Yes,Yes*,Yes*
:attr:`~AnymailMessage.metadata`,Yes,Yes,No,Yes,Yes,Yes,No,Yes,Yes,Yes,Yes,Yes
:attr:`~AnymailMessage.merge_metadata`,Yes*,Yes,No,Yes,Yes,Yes,No,Yes,Yes,Yes,Yes,Yes
:attr:`~AnymailMessage.send_at`,No,Yes,Yes,Yes,No,Yes,No,No,No,Yes,Yes,Yes
:attr:`~AnymailMessage.tags`,Yes,Yes,Yes,Yes,Max 1 tag,Yes,Max 1 tag,Max 1 tag,Yes,Yes,Max 1 tag,Yes
:attr:`~AnymailMessage.track_clicks`,No,No,Yes,Yes,Yes,Yes,No,Yes,No,Yes,Yes,Yes
:attr:`~AnymailMessage.track_opens`,No,No,Yes,Yes,Yes,Yes,No,Yes,No,Yes,Yes,Yes
:ref:`amp-email`,Yes,No,No,Yes,No,No,No,No,No,Yes,Yes,Yes
.. rubric:: :ref:`templates-and-merge`,,,,,,,,,,,,
:attr:`~AnymailMessage.template_id`,Yes,Yes,Yes,Yes,Yes,Yes,No,Yes,No,Yes,Yes,Yes
:attr:`~AnymailMessage.merge_data`,Yes*,Yes,Yes,Yes,Yes,Yes,No,Yes,No,Yes,Yes,Yes
:attr:`~AnymailMessage.merge_global_data`,Yes*,Yes,(emulated),(emulated),Yes,Yes,No,Yes,No,Yes,Yes,Yes
.. rubric:: :ref:`Status <esp-send-status>` and :ref:`event tracking <event-tracking>`,,,,,,,,,,,,
:attr:`~AnymailMessage.anymail_status`,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes
:class:`~anymail.signals.AnymailTrackingEvent` from webhooks,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes
.. rubric:: :ref:`Inbound handling <inbound>`,,,,,,,,,,,,
:class:`~anymail.signals.AnymailInboundEvent` from webhooks,Yes,Yes,Yes,Yes,Yes,Yes,Yes,Yes,No,Yes,Yes,No