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When you enter a destination, you are editing incomplete address, mailer help you compensate last word by use auto-complete. However, Subject is not used auto-complete. it is enter easy by auto-complete subject line choice sent in the past.
About this Add-on
This add-on by selecting the subject of email sent in the past, you can easily enter.
Subject input box, type something and one letter, sent by email with the subject in the past pops up, just click on it.
History will continue to do so when you install an add a subject from the subject before you install an add-on will not be displayed.
To add to the history, only similarity is below a set value compared to the subject in history, then click Add.
Therefore, by setting a similarity value of 100 will be added to all of history.
Is scheduled to globalization.
Order history will be considered.