I have courierfax setup and running great with my mail system.
But I've been getting daily complaints from people trying to send us faxes that there not going though. I'm looking though the logs
/var/log/mgetty-ttyS0 and /var/log/mail But I'm not really sure what I'm looking for.
Incoming faxes are handled entirely by mgetty+sendfax. Courier is not involved, unless you've installed the new_fax script which converts all fax images to .png's, and mails them to the faxadmin account.
And even in that case, the transmission is still handled entirely by mgetty. If you're having trouble receiving faxes, that's not something Courier's involved with.
One thing I've noticed is fax servers that send to us fail alot more than people that are hand faxing. I'm not sure what that menas, but
I would double check that you've set the serial port to the maximum rate of 115,200bps. Sounds like you have the serial port set to 9600bps, which may be fast enough to receive faxes from fax machines, that typically use padding due to optical scanning delays. Fax servers are far more likely to use the extended 14.4Kbps transmission speed, without padding, resulting in an overflow condition on the serial port.
Due to RS-232 asynchronous padding, your serial port has to go at least 19.2Kbps in order to reliably receive faxes.
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