* Catch and error out if a user adds a feed with a duplicate name.
* Split sender into both sendmail's -F and -f.
* Fix an error with SMTPConnectionError inhertence order ("does not take keyword arguments").
* Catch and error out if a user adds a feed with a duplicate name.
* Split sender into both sendmail's -F and -f.
* Fix an error with SMTPConnectionError inhertence order ("does not take keyword arguments").