On Fri, 14 Sep 2001, Michael Richardson wrote:
> I have recently (2001/9/12) started to sign my zone, sandelman.ottawa.on.ca.
>
> Mail started getting rejected by various systems, but not all. It appears
> that they do not properly process the SMTP From line, and believe it to be
> spam. (At the least, I'd rather it returned 4xx code, as it may just be a
> slow DNS)
Not spam, just unverifiable:
> 354 Enter message, ending with "." on a line by itself
> >>> .
> 550 rejected: cannot route to sender <mcr@???>
That says "I don't recognize the sender address; if called upon to
deliver to it I couldn't; therefore, if I have to send a bouce to it I
can't; therefore I'm not prepared to accept this message."
Even now, there is something wrong with your zone:
lox.sandelman.ottawa.on.ca. MX 10 nox6.sandelman.ottawa.on.ca.
lox.sandelman.ottawa.on.ca. MX 10 mailhost.sandelman.ottawa.on.ca.
mailhost.sandelman.ottawa.on.ca. A 192.139.46.2
No A record for nox6.sandelman.ottawa.on.ca.
lox.sandelman.ottawa.on.ca. A 192.139.46.2
However, that of itself doesn't stop Exim routing to it.
There are also problems with your nameservers:
-------- Nameserver ns.flora.ottawa.on.ca for sandelman.ottawa.on.ca --------
Nameserver ns.flora.ottawa.on.ca not responding
lox.sandelman.ottawa.on.ca MX record not found at ns.flora.ottawa.on.ca, try again
Nameserver ns.flora.ottawa.on.ca not responding
lox.sandelman.ottawa.on.ca A record not found at ns.flora.ottawa.on.ca, try again
-------- Nameserver nic.sandelman.ottawa.on.ca for sandelman.ottawa.on.ca --------
lox.sandelman.ottawa.on.ca MX 10 mailhost.sandelman.ottawa.on.ca
lox.sandelman.ottawa.on.ca MX 10 nox6.sandelman.ottawa.on.ca
!!! lox.sandelman.ottawa.on.ca MX host nox6.sandelman.ottawa.on.ca has no A record
lox.sandelman.ottawa.on.ca SIG (not yet implemented)
lox.sandelman.ottawa.on.ca A 192.139.46.2
lox.sandelman.ottawa.on.ca SIG (not yet implemented)
-------- Nameserver lotharon.endicor.com for sandelman.ottawa.on.ca --------
Nameserver lotharon.endicor.com not responding
lox.sandelman.ottawa.on.ca MX record not found at lotharon.endicor.com, try again
Nameserver lotharon.endicor.com not responding
lox.sandelman.ottawa.on.ca A record not found at lotharon.endicor.com, try again
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
