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CloseReview for Expiry Timestamp by Sander Holthaus
Rated 3 out of 5 stars
Nice, but would be better if it could work for POP3 as well and if one could set an Expiry time for outgoing email
This review is for a previous version of the add-on (1.0.7).To create your own collections, you must have a Mozilla Add-ons account.