Sendmail and fetchmail problem

[Jorge David Ortiz Fuentes <jorge_ortiz@hp.com>]

Hi all,

    We are migrating to a new mailserver and I would like to download
all my messages from the old server to localmail. To do so I am using
fechmail with this config file:
-----
set syslog

poll mi.imap.server protocol imap:
        user "Jorge Ortiz" is jorge
        password "Something-here"
-----

When I run fetchmail with the -a flag, I get the following messages in
my syslog:
Sep 14 12:51:52 hpspsabc fetchmail[11594]: SMTP< 451
<Somebody@imap.server.hp.com>... Sender domain must resolve
Sep 14 12:51:52 hpspsabc fetchmail[11594]: SMTP> RSET
Sep 14 12:51:52 hpspsabc fetchmail[11594]: SMTP< 250 Reset state
Sep 14 12:51:52 hpspsabc fetchmail[11594]: SMTP error: 250 Reset state

    How can this be solved?

    Thanks in advance,

        Jorge

P.S.: Please reply also to my email address.