Approximate (facultative) name of icon:

001.	add mail
002.	remove mail
003.	check mail
004.	delete mail
005.	favorite mail
006.	move mail left
007.	move mail right
008.	move mail down
009.	move mail up
010.	mail options
011.	edit/write mail
012.	receive mail
013.	send mail
014.	refresh mail
015.	search mail
016.	mail attention
017.	rss mail
018.	favorite mail 2
019.	save mail
020.	mail
021.	new mail
022.	postcard
023.	send all
024.	mails
025.	move mail to back
026.	move mail upfront
027.	receive mail 2
028.	send mail 2
029.	mail 2
030.	attachment
031.	address book
032.	flag / priority blue
033.	flag / priority green
034.	flag / priority orange
035.	flag / priority yellow
036.	flag / priority gray
037.	flag / priority red