DragonFly kernel List (threaded) for 2008-02
Re: sendmail 8.14 has a serious memory corruption bug in it
Claus Assmann wrote:
On Mon, Feb 18, 2008, Matthew Dillon wrote:
I have reported the bug to the sendmail folks.
And I tried to reply:
A mail from you could not be delivered. See below for details.
550 5.0.0 You cannot send email directly from a DSL or CABLEMODEM or other mass-media host, you must
instead relay it through your ISP's mail host. Sorry, there is too much spam coming from customers
of your ISP and your ISP is not doing a good job of stopping it. If you are a legitimate mail
domain you must have a correctly configured reverse DNS.
The sendmail.org website states from which IP address a reply will
most likely come (yes, it's static, no, PacBell won't delegate
Off topic, but I haven't used an MTA yet (sendmail, postfix, qmail,
courier-mta, exim) .. that checks *websites* for MX or PTR RR's.
Nor any hint in any RFC as to why or how they could or should do.
PacBell - or any other dominant carrier/ISP, IP-block-holder - very well
*will* enter a PTR RR in their DNS (the one that matters)
- IF you are on the appropriate service contract
- AND apply in the manner they require.
It is an embarassingly bad example that deval team members of the
'senior service' MTA would not heed the RFC on that issue.
A bit of effort, and I'm sure it can be repaired quickly.