Portmanager is like Portupgrade but better for quite a few reasons. One of which is when updating everything it handles the whole updating process much smoother.
Updating All Ports
CAUTION: Please read the /usr/ports/UPDATING before attempting this. At least check the ports that you really need will upgrade without a problem.
To upgrade enter:
# portmanager -u -l
This keeps a log in the /var/log/portmanager.log file.
When resuming enter:
# portmanager -u -l --resume
You may need to run it a few times. Refer to the log and search for any ports which did not fetch and you will have to go and download those and put them in /usr/ports/distfiles directory. Then you can resume. There might even be some ports that have errors when compiling, it maybe best to go and upgrade these manually.
# portmanager -s
Listing Ports which require updating
# portmanager -s | grep OLD