>>FAQ (ie, knowledge base + list archives)
>
>http://support.ipswitch.com/kb/IM-19981016-DM02.htm
>
>There is the link to my specific issue.
absolutely amazing :)))
>The IP address for the IMail server registry entry has encode.com as the
>official host name. If I change it to mail.encode.com it reports that on
>the ehlo. But this creates an issue with users logging in to encode.com
>email addresses. Fun.
well, that's easy to fix in DNS with foresight, harder in hindsight.
For the FAQth time:
domain.com. A ip.ad.re.ss ; web box without "www."
www.domain.com. A ip.ad.re.ss ; you better not ask
;
domain.com. mx 10 mx.somewhere.com.
;
smtp.domain.com. A ip.ad.re.ss ; user send outbound, smtp auth
pop.domain.com. A ip.ad.re.ss ; user reads mailbox
imap.domain.com. A ip.ad.re.ss ; user reads mailbox
webmail.domain.com. A ip.ad.re.ss ; user reads mailbox
mail.domain.com. A ; ip.ad.re.ss ; don't really need this
; "generic" hostname, it's not an internet
; convention or custom. too broad. seems to be mostly
; an ipswitch thang.
; and their docs used to recommend wrongly
Set up the Imail default hostname as domain.com (this has nothing to with
reverse).
smtp.domain.com A ip.ad.re.ss. ;of sending mail server
ss.re.da.pi.in-addr.arpa PTR smtp.domain.com. ; of sending mail server
Now, what if you have 500 Imail virtual servers on that ip address? insoluble.
The above DNS records have nothing to do with the helo/ehlo hostname, nor
the hostname in the SMTP banner.
I suggest you pound on the mail admin over there and tell him he is
rejecting valid mail from a non-abusive mail server whose reverse zone is
delegated and PTR records assigned, A and MX records exsist, is not in any
RBL server, is not an open relay, etc, etc. So why TF won't you accept our
mail?
Spread the grief around copiously, esp to where it's deserved.
>PTR record to match encode.com but some ISP's are still saying no go as
>the IP address doesn't match.
You should realize that this problem is not solvable because that only one
PTR record is used by applications, in practice. Mail servers that reject
becasue of bad reverse must have tons of false positives, ie, rejecting
non-abusive mail servers such as yours, causing you and your and their
users daily grief.
btw, what is the error you are receiving from the rejecting mail server?
why do I ask? because you reverse is already cool:
# dig encode.com mx
; <<>> DiG 9.2.0 <<>> encode.com mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38364
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 1
;; QUESTION SECTION:
;encode.com. IN MX
;; ANSWER SECTION:
encode.com. 79641 IN MX 10 mail.encode.com.
;; ADDITIONAL SECTION:
mail.encode.com. 79641 IN A 206.130.189.51
;; Query time: 2 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jan 8 10:21:24 2002
;; MSG SIZE rcvd: 103
# dig -x 206.130.189.51
; <<>> DiG 9.2.0 <<>> -x 206.130.189.51
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28533
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0
;; QUESTION SECTION:
;51.189.130.206.in-addr.arpa. IN PTR
;; ANSWER SECTION:
51.189.130.206.in-addr.arpa. 86400 IN PTR mail.encode.com.
So I guess you are misunderstanding the reject message.
Len
http://MenAndMice.com/DNS-training
http://BIND8NT.MEIway.com : ISC BIND 8.2.4 for NT4 & W2K
http://IMGate.MEIway.com : Build free, hi-perf, anti-abuse mail gateways
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