Third-person singular simple present indicative form of outbox.(verb)
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Use "outboxes" in a sentence
"For the most part we need tools that are familiar to use - inboxes and outboxes in email apps, posts that migrate to the top of a site or list according to popularity in Digg or organization folders and slideshows in Flickr, etc."
"You can set Vanish to self-destruct e-mail, Facebook posts and chat messages automatically, making them irretrievable from all Web sites, inboxes, outboxes, backup sites and home computers, says Roxana Geambasu, the lead grad student on the project."
"In this stylish and absurdly violent kick in the keister, Jolie assumes myriad disguises and punches way above her weight as a CIA agent accused of being a Russian sleeper spy -- a notion so alien when Kurt Wimmer first wrote the film that, for years, it languished in studio outboxes."