Re: [9fans] smtpd

[erik quanstrom <quanstro@quanstro.net>]

yes.  i believe this bug was fixed.  i had this problem, too.
	9804261509.aa06201
gives a different error (Invalid address) than "unknown user".
any local name with an invalid character will do this.
i think you need to update /mail/lib/validatesender.  here's
my fix:

#!/bin/rc
mail -x $1 | grep -vs '^unknown user|^Invalid address'

this fix is very important.  without it, you can be an open spam
relay.

- erik

> The following data is extracted from my /sys/log/smtpd and /sys/log/ 
> smtp.
> 
> smtpd:
> ar Oct 30 13:43:16 ehlo from 82.34.95.22 as  
> 82-34-95-22.cable.ubr05.gill.blueyonder.co.uk
> ar Oct 30 13:43:26 [82-34-95-22.cable.ubr05.gill.blueyonder.co.uk/ 
> 82.34.95.22] fastcoco.com!kjeld sent 179 bytes to ar.aichi-u.ac.jp! 
> 9804261509.aa06201
> 
> smtp:
> ar Oct 30 13:43:26 /dev/null sent 2623 bytes to kjeld@fastcoco.com
> 
> The person who submitted the mail from  
> 82-34-95-22.cable.ubr05.gill.blueyonder.co.uk might not be  
> kjeld@fastcoco.com.
> 
> I think it is better for smtpd to reject with message: 550 Requested  
> action not taken: mailbox unavailable
> 
> Sorry if this is already fixed.