Mail::Sendmail cannot send to addresses with tildes

[Benabik]

Mail::Sendmail.shellquote escapes characters like Shellwords.escape, but then also wraps the argument in double quotes. This causes incorrect values to be passed to sendmail/exim.

require 'mail'
require 'shellwords'

address = 'test~@example.com'
system "echo #{Shellwords.escape address}"
system "echo #{Mail::Sendmail.shellquote address}"

Outputs:

test~@example.com
test\~@example.com

[Benabik]

Further testing indicates that Mail::Exim can send to those addresses (as it's not passed on the command line), but it can't send from them.

[jeremy]

#1122