Cannot port install mailx

[James Hozier]

$ sudo port install mailx
Password:
Sorry, try again.
Password:
--->  Fetching archive for mailx
--->  Attempting to fetch mailx-12.4_0.darwin_10.x86_64.tbz2 from http://packages.macports.org/mailx
--->  Fetching mailx
--->  Attempting to fetch mailx-12.4.tar.bz2 from http://voxel.dl.sourceforge.net/heirloom
--->  Verifying checksum(s) for mailx
--->  Extracting mailx
--->  Applying patches to mailx
--->  Configuring mailx
--->  Building mailx
Error: Target org.macports.build returned: shell command failed (see log for details)
Log for mailx is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_mail_mailx/mailx/main.log
Error: Status 1 encountered during processing.
To report a bug, see <http://guide.macports.org/#project.tickets>
$