smtp authentication fails

Hi, I'm having trouble getting pine to authenticate properly to the
smtp server given by my email provider. The settings I was given
(copied from http://lavabit.com/settings.html) are:

Incoming Mail Server:   lavabit.com
POP3 Port:      110
POP3 over SSL Port:     995
IMAP4 Port:     143
IMAP4 over SSL Port:    993
Outgoing mail Settings. Outgoing Mail Server:   lavabit.com
SMTP Ports:     25, 587, 2525, or 3535
SMTP over SSL Port:     465

It also says on that page:

For our servers to relay outbound e-mail you must enable
authentication. Please see our tutorials for help configuring your
client. Our servers support the PLAIN and LOGIN authentication
methods.

All outbound e-mails must be relayed through our servers. If you do
not use our servers for outbound e-mail you risk having your
messages  rejected by the recipient's e-mail server. This is because
Lavabit publishes SPF and domainkey information that some e-mail
servers use to verify that messages claiming to be from lavabit.com
originated on a server authorized to represent lavabit.com.

So, in my pine configuration settings, I have:

user-domain = lavabit.com
smtp-server  = lavabit.com/user=marc

In my .pinerc, I also have this:

# List of SASL authenticators to disable.
disable-these-authenticators=

The value is blank.

Yet, when I try to send an email with these settings, I first get the
screen that says:

There was a failure validating the SSL/TLS certificate for the server
                lavabit.com
The reason for the failure was
                unable to get local issuer certificate (details)

When I select (details), I see:

Host given by user:
  lavabit.com
Reason for failure:
  unable to get local issuer certificate
Certificate being verified:
  /C=US/O=The Go Daddy Group, Inc./OU=Go Daddy Class 2
Certification Authority

So I exit this, and am returned to the previous screen where it gives
me the option to continue sending the message anyway, but when I
do this it gives me this error:

Error sending: Can not authenticate to SMTP server: 501 Invalid
AUTH command.

Lavabit has a tutorial for thunderbird at
http://lavabit.com/thunderbird.html which I followed, and it is able
authenticate and send email through their smtp server, but I much
prefer using pine. An admin at lavabit.com was unable to provide
any useful help, and requested that I let them know if I was able to
get pine working.

TIA,

Marc Greene

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