let SendmailAccount.send_mail cast the mail to str

instead of assuming that it already receives a string. The new
behaviour is in sync with the type documented for the superclass
`Account`.

1 files changed, 4 insertions, 1 deletions

diff --git a/alot/account.py b/alot/account.py
index 5965afa2..d8f114c5 100644
--- a/alot/account.py
+++ b/alot/account.py
@@ -193,7 +193,7 @@ class SendmailAccount(Account):
         """Pipe the given mail to the configured sendmail command.  Display a
         short message on success or a notification on error.
         :param mail: the mail to send out
-        :type mail: str
+        :type mail: :class:`email.message.Message` or string
         :returns: the deferred that calls the sendmail command
         :rtype: `twisted.internet.defer.Deferred`
         """
@@ -214,6 +214,9 @@ class SendmailAccount(Account):
             logging.error(failure.value.stderr)
             raise SendingMailFailed(errmsg)
 
+        # make sure self.mail is a string
+        mail = str(mail)
+
         d = call_cmd_async(cmdlist, stdin=mail)
         d.addCallback(cb)
         d.addErrback(errb)