If the driver concerned were part of Ubuntu that might be fixable. But you state it is "unsupported", so the Ubuntu community can't support it, unfortunately.
I suspect the driver does not directly need postfix, just "any way to send email out from this machine"; postfix is the default choice for many packages in Ubuntu to install to meet such a requirement. If you prefer something smaller you can install ssmtp and set that up, and many packages will then use it instead of postfix for their outbound email needs.
Why a printer driver wants to email something (perhaps registration info to HP? Perhaps alerts to an admin when the printer is low on toner or out of paper?) I don't know. Without full source code for the driver, I can't really find out, either.
Just so you know, Internet RFC 1178 (which is all about choosing hostnames) specifically advises "Don't use digits at the beginning of the name"... :)
It might be good for Ubuntu to check for this issue, when the host names is chosen during installation, and at least warn the unwary user/systemadministrator about it.
If the driver concerned were part of Ubuntu that might be fixable. But you state it is "unsupported", so the Ubuntu community can't support it, unfortunately.
I suspect the driver does not directly need postfix, just "any way to send email out from this machine"; postfix is the default choice for many packages in Ubuntu to install to meet such a requirement. If you prefer something smaller you can install ssmtp and set that up, and many packages will then use it instead of postfix for their outbound email needs.
Why a printer driver wants to email something (perhaps registration info to HP? Perhaps alerts to an admin when the printer is low on toner or out of paper?) I don't know. Without full source code for the driver, I can't really find out, either.
Just so you know, Internet RFC 1178 (which is all about choosing hostnames) specifically advises "Don't use digits at the beginning of the name"... :)
It might be good for Ubuntu to check for this issue, when the host names is chosen during installation, and at least warn the unwary user/systemadmi nistrator about it.