sendmail problem - Helo command rejected: Host not found
cswiger at mac.com
Mon Jan 10 15:50:50 PST 2005
Srot BULL wrote:
[ ... ]
> If I am wrong, then can anyone...give me a simple explanation (simple
> please - I know that I am asking too much, but I can assure you that I
> have already bookmarked the sendmail Website and sendmail batbook is
> already in my list of books that I am planning to purchase...not yet
The simple answer is that the name your machine claims to be isn't registered
in the DNS, which is normal for dynamic connections. You should either relay
all email to the mailserver your ISP should have available, or you should
configure your MTA to masquerade as a valid domain.
The former is likely to better in terms of passing spam-sensitive mailers.
[ ... ]
>><<< 450 <r40e.point.ne.jp>: Helo command rejected: Host not found
>><freebsd-questions at freebsd.org>... Deferred: 450 <r40e.point.ne.jp>:
>>Helo command rejected: Host not found
>><<< 554 Error: no valid recipients
>>Warning: message still undelivered after 4 hours
>>Will keep trying until message is 5 days old
Yes, see the NXDOMAIN response ("no such domain"):
28-cube% dig r40e.point.ne.jp.
; <<>> DiG 9.2.2 <<>> r40e.point.ne.jp.
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 59233
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
[ ... ]
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