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тАО01-22-2002 08:07 AM
тАО01-22-2002 08:07 AM
Sendmail 8.11.1 and relaying...
I just upgraded our Sendmail from 8.8.6 to the 8.11.1 special release. It seems to work OK after building the new .cf file but I tested it for relaying and it appears to be open relay :-( I though this release would eliminate this as a default? Any tips on how to stop the open relay would be much appreciated?
Thanks!
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тАО01-22-2002 08:12 AM
тАО01-22-2002 08:12 AM
Re: Sendmail 8.11.1 and relaying...
Richard
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тАО01-22-2002 08:17 AM
тАО01-22-2002 08:17 AM
Re: Sendmail 8.11.1 and relaying...
I would:
telnet mailserver.com 25
helo domain.com
mail from:joe@aol.com
rcpt to:bob@yahoo.com
if you are denied, then you are not an open relay.
Let us know,
C
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тАО01-22-2002 08:19 AM
тАО01-22-2002 08:19 AM
Re: Sendmail 8.11.1 and relaying...
I have been talking to a fellow at the RSS site. After finding out our server was listed with them as an open relay, we upgraded right away to the 8.11.1 with no success.
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тАО01-22-2002 08:40 AM - last edited on тАО05-17-2021 10:09 PM by Ramya_Heera
тАО01-22-2002 08:40 AM - last edited on тАО05-17-2021 10:09 PM by Ramya_Heera
Re: Sendmail 8.11.1 and relaying...
Awww .. the good ole denied syndrome .. been there done that .. I am still running 8.8.6 and managed to add some rulesets to get un denied. I tried to upgrade to sendmail 8.9.3 and even 8.11 .. but it didnt work because we are running ldap and we need to upgrade ldap before we upgrade sendmail and right now I cant upgrade ldap. UGG its a nightmare. But I closed off my relay with no problem ..But now earthlinx found a hole =( I deny everyway but one .. and now I am totaly blocked from sending thoose fools email. I am working on a solultiuon for that too .. without having to upgrade... this may be a tough one though .. In case you are wondering here is the rule changes that I made to 8.8.6 to stop the "big" relay problem.
Scheck_rcpt
# first: get client addr
R$+ $: $(dequote "" $&{client_addr} $) $| $1
R0 $| $* $@ ok no client addr: directly invoked
R$={LocalIP}$* $| $* $@ ok from here
# not local, check rcpt
R$* $| $* $: $>3 $2
# remove local part, maybe repeatedly
R$+ $:$>removelocal $1
# still something left?
R$*<@$+>$* $#error $@ 5.7.1 $: 550 we do not relay
Sremovelocal
# remove RelayTo part (maybe repeatedly)
R$*<@$*$={RelayTo}.>$* $>3 $1 $4
R$*<@$=w.>$* $: $>removelocal $>3 $1 $3
R$*<@$*>$* $@ $1<@$2>$3
# dequote local part
R$- $: $>3 $(dequote $1 $)
R$*<@$*>$* $: $>removelocal $1<@$2>$3
Richard
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тАО04-17-2002 03:55 AM
тАО04-17-2002 03:55 AM
Re: Sendmail 8.11.1 and relaying...
Cuurently I am running sendmail 8.10.2 , can anyone tell me how to resolve this problem without upgrading the sendmail.