pypi / postmarker

postmarker

What changed in postmarker 2, from its official release notes, upgrade guides and advisories. Sources checked 2026-11-12.

3 breaking1 security27 new APIs and options1 behavior and defaults1 tooling11 fixes and other

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@unstale/cli 0.3.0 on npm

postmarker 244 changes

Breaking changes 3

Raises ClientError with Postmark's error_code instead of a plain PostmarkerException; batches use the first failure's error_code.
2.0release notes
Attachment content from MIME parts is sent as single-line base64 without MIME line breaks.
2.0release notes
Support for Python 3.6–3.9 has been removed.
2.0release notes

Security 1

Spam check requests now use HTTPS instead of sending email content over plain HTTP.
2.0release notes

New APIs and options 27

Adds a spam complaint webhook wrapper.
2.0release notes
Adds ConfirmationPersonalNote to sender creation and editing.
2.0release notes
Adds LayoutTemplate support to template creation, validation, listing and editing.
2.0release notes
Adds a wrapper for link click webhooks.
2.0release notes
Adds message stream listing.
2.0release notes
Adds message stream archiving.
2.0release notes
Adds message stream creation.
2.0release notes
Adds message stream editing.
2.0release notes
Adds message stream retrieval.
2.0release notes
Adds message stream unarchiving.
2.0release notes
Adds listing of outbound message clicks.
2.0release notes
Adds retrieval of outbound message clicks.
2.0release notes
Exports the on_exception signal from postmarker.django alongside pre_send and post_send.
2.0release notes
Adds a clicks method to OutboundMessage.
2.0release notes
Adds a PostmarkClient that uses only an account token.
2.0release notes
Adds the py.typed marker.
2.0release notes
Adds account server listing.
2.0release notes
Adds account server creation.
2.0release notes
Adds account server deletion.
2.0release notes
Adds account server editing.
2.0release notes
Adds account server retrieval.
2.0release notes
Adds listing of suppressions per message stream.
2.0release notes
Adds creation of suppressions per message stream.
2.0release notes
Adds deletion of suppressions per message stream.
2.0release notes
Adds a subscription change webhook wrapper.
2.0release notes
Copies templates between servers.
2.0release notes
Adds TemplateType for layout templates.
2.0release notes

Behavior and default changes 1

Accepts the modern EmailMessage API wherever MIME messages are accepted.
2.0release notes

Tooling 1

Adds type annotations.
2.0release notes

Fixes and other changes 11

Stops pagination at Postmark's 10,000 limit for count plus offset.
2.0release notes
API manager calls now honor an explicitly supplied token_type and only default to the manager's token type when it is not explicit.
2.0release notes
Django 5.2, 6.0 and 6.1 are supported.
2.0release notes
Fixes a ValueError that caused the backend to fail on Django 6.0+.
2.0release notes
Stops emitting RemovedInDjango2028Warning for fail_silently on Django 6.1+.
2.0release notes
Preserves the MAILERS alias on Django 6.1+ so unknown OPTIONS are not hidden.
2.0release notes
String representations now show the sender and recipients instead of None.
2.0release notes
Text attachments from MIME messages, including through the Django backend, are now base64 encoded as required by Postmark.
2.0release notes
On Python 3.11+, return_value is now a configurable mock rather than an internal sentinel.
2.0release notes
Python 3.11–3.15 are supported.
2.0release notes
A list of emails now produces an explanatory ValueError directing callers to pass them as separate arguments.
2.0release notes