ouch

Looks like we might want to send those SMTP commands in caps ...

% telnet burleigh smtp
Trying 158.125.18.2...
Connected to burleigh.lut.ac.uk.
Escape character is '^]'.
220 Burleigh.lboro.ac.uk Simple Mail Transfer Service Ready
Helo litterbug.lut.ac.uk
250 Unknown Command
HELO litterbug.lut.ac.uk
250 Burleigh.lboro.ac.uk

No prizes for guessing the vendor

Martin