BusyBox v1.18.5 on Toastman Tomato Linux running on an Asus RT-N16 router Summary: When using sendmail with a user friendly name in the TO field, sendmail butchers it to where the mail is undeliverable. Using the busybox command: sendmail -t -f no-reply@myserver.com -S MyServer -auMyUser -apMyPass < mail.txt And mail.txt is: To: "John Smith the Third" <john@yahoo.com> From: Joe@MyServer.com Date: Sat, 20 Apr 2013 11:01:42 -0400 Subject: test mail Test Message. For some reason, sendmail strips the quote characters and brackets from the TO field, and incorrectly generates the following line: RCPT TO:<johnsmiththethirdjohn@yahoo.com> It should not do that.