Version Compatibility

This extension is maintained as one release line per TYPO3 major. Composer selects the matching line automatically when you run oliverkroener/ok-exchange365-mailer without a version constraint.

Support matrix

TYPO3	Extension	Branch	PHP	Graph SDK	Status
14.x	4.4.x	`main`	8.2 – 8.5	^2	Active
13.4 LTS	4.4.x	`main`	8.2 – 8.5	^2	Active
12.4 LTS	4.4.x	`main`	8.1 – 8.4	^2	Active
11.5 ELTS	3.2.x	`feature-typo3-11`	7.4 – 8.3	^2	Maintenance
10.4 ELTS	2.2.x	`feature-typo3-10`	7.2 – 7.4	none (Guzzle)	Maintenance
9.5	1.1.x	`feature-typo3-9`	7.2 – 7.4	none (Guzzle)	Maintenance

Note

The 1.x line for TYPO3 9.5 predates Symfony Mailer — TYPO3 9.5 still used SwiftMailer — so its transport is a Swift_Transport rather than the architecture described in Architecture. Like every other line, it is covered by the test matrix. The 1.x and 2.x lines call Microsoft Graph directly over HTTP instead of through the Graph SDK.

Pinning a version

Composer resolves the correct line on its own. Pin explicitly only when you need to:

# TYPO3 12, 13 or 14
composer require oliverkroener/ok-exchange365-mailer:^4.4

# TYPO3 11
composer require oliverkroener/ok-exchange365-mailer:^3.2

# TYPO3 10
composer require oliverkroener/ok-exchange365-mailer:^2.2

If composer require reports that the package cannot be resolved, the cause is almost always a TYPO3 major that the requested version does not cover — check the table above rather than forcing the constraint.

What differs between the lines

The 4.x line is the reference implementation. The older lines differ in ways that matter if you read the source or report a bug:

Configuration precedence. From 2.2.0 / 3.2.0 onwards all lines overlay frontend TypoScript on top of the mail settings per key. Earlier 2.x and 3.x releases let a frontend TypoScript configuration replace the mail settings wholesale.
Frontend TypoScript access. The 4.x line reads the frontend.typoscript request attribute. The 2.x and 3.x lines read $GLOBALS['TSFE']->tmpl->setup, which is the correct API on TYPO3 10 and 11 but was removed in TYPO3 13.
Credential blinding. The 4.x line uses a PSR-14 event listener, the 3.x line a hook. The 2.x line does not blind credentials at all.
Graph SDK. The 2.x line uses microsoft/microsoft-graph v1 (Microsoft\Graph\Graph); 3.x and 4.x use v2 (GraphServiceClient).