[Tickets #5679] SMTP auth "Best available authentication" does not work

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Ticket URL: http://bugs.horde.org/ticket/?id=5679
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 Ticket             | 5679
 Created By         | horde-bugs at conuropsis.org
 Summary            | SMTP auth "Best available authentication" does not work
 Queue              | Horde Framework Packages
 Version            | FRAMEWORK_3
 Type               | Bug
 State              | Unconfirmed
 Priority           | 2. Medium
 Owners             | 
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horde-bugs at conuropsis.org (2007-08-28 22:51) wrote:

If one sets Mailer / SMTP authentication to "Best available authentication"
in the admin web interface, this sets the option to the string '1'. But
this instructs Mail_smtp to instruct Net_SMTP to use authentication method
'1' only, not PLAIN/LOGIN/CRAM-MD5/... whatever the server supports.
Indeed, abstract from Mail_smtp:

        if ($this->auth) {
            $method = is_string($this->auth) ? $this->auth : '';

The "best available authentication" enum choice needs to set the option to
the boolean true, or the integer 1, or any other non-string value that is
not the boolean false.