Program icon used by Mailvelope composed of oxygen icons
Nuno Pinheiro, David Vignoni, David Miller, Johann Ollivier Lapeyre, Kenneth Wimer, Riccardo Iaconelli – Oxygen team
LGPL
<a href="//commons.wikimedia.org/wiki/File:Oxygen480-actions-edit-find-mail.svg" title="File:Oxygen480-actions-edit-find-mail.svg">Oxygen480-actions-edit-find-mail.svg</a> <a href="//commons.wikimedia.org/wiki/File:Oxygen15.04.1-document-encrypt.svg" title="File:Oxygen15.04.1-document-encrypt.svg">Oxygen15.04.1-document-encrypt.svg</a> <a rel="nofollow" class="external free" href="https://github.com/mailvelope/mailvelope/blob/master/common/img/mail_locked_128.png">https://github.com/mailvelope/mailvelope/blob/master/common/img/mail_locked_128.png</a>