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I'm very happy to have this option in new version (http://sendy.co/discussion/358/custom-text-in-subscribe-mail-for-double-opt-in-lists#Item_2), but please include option to create custom subject also.
Thx and HNY,
How can I miss that? I've just added it in. Download the latest version again at http://sendy.co/get-updated.
Then just replace these files: