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By executing this command, Composer locates xqueue/typo3-maileon-integration and then symlinks it to typo3conf/ext/typo3-maileon-integration
Install with Zip package
todo
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Get the Zip package:
https://extensions.typo3.org/extension/typo3_maileon_integration
Open the TYPO3 backend.
Go to the Extension Manager under `Admin Tools` -> `Extensions`.
Upload the package.
Inserting a template (TypoScript)
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