I've just upgraded an SME 7.6 machine to SME 8, while also upgrading the hard drives. The machine originally had two 250 GB drives in hardware raid (IBM X system server, about 4 years old), which I replaced with two 500 GB drives.
I stripped out installed contribs (

forgot unjunkmgr), backed the system up, then replaced the drives with the new, bigger drives. Did a clean install of SME 7.6 and restored the backup. Checked that everything worked as it should, then upgraded to SME 8.
While the system is working, I've hit a problem with sending email from machines on the local network. Thunderbird is the standard client used, and I've set it to port 25, using STARTTLS with plain passwords. But I'm getting relaying refused errors every time I try and send an email.
Before I raise a bug, is there anything I should be checking? I tried changing the outgoing server to the fully qualified server name, which didn't change anything. I've searched bugzilla, but either there's nothing relevant or my search terms aren't correct. So, any ideas?
Paul.