Re: Unable To Relay

HI!
I want to say that we have installed last week the following security update
for Exchange:
"Microsoft Security Bulletin MS05-021
Vulnerability in Exchange Server Could Allow Remote Code Execution (894549)"

Perhaps this update changed some configurations???

Best Regards
Cicek

"mustafa" wrote:

> Hi Nagendra,
>
> first thanks for your response.
> We use ISA Server 2004 and Netscreen Firewall. SMTP tranfer worked well
> before. I don't know why, we cannot send now any mail to external domains.
> Besides there is other problem (perhaps the same problem). We configured the
> front-end Exchange as Bridgehead server and this server is also our RPC proxy
> server. If we send mails to external domains, not front-end (Bridge head)
> but back-end server tries to send mails. It worked taht also well before.
> Perhaps the both problem have the same problem source?
> Any idea?
>
> Best Regards
> Mustafa
>
> "Nagendra Sitharamaiah [MSFT]" wrote:
>
> > Cicek
> >
> > if you have not already done so, please check teh following KB articles:
> >
> > 288593 Exchange Cannot Receive SMTP Mail Through Firewalls :
> > http://support.microsoft.com/?id=288593
> > 895857 SMTP mail cannot be sent or cannot be received in Exchange Server :
> > http://support.microsoft.com/?id=895857
> >
> > Regards
> >
> > --
> > Nagendra Sitharamaiah
> > MCSE, CCNA, MCT, CISSP
> > Microsoft
> > Use of included script samples are subject to the terms specified at
> > http://www.microsoft.com/info/cpyright.htm
> > This posting is provided "AS IS" with no warranties, and confers no rights.
> > Please do not send email to this address, post a reply to this newsgroup.
> >
> > "mustafa" <mustafa@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> > news:2625D960-F244-4D4A-AD2E-7B31B822772D@xxxxxxxxxxxxxxxx
> > > Hi!
> > > We deployed Exchange 2003 with front-end and back-end Exchange.
> > > We use SMTP connector to tranform the mails.
> > > If our internal users send any mail to any external domain, they get
> > > "#5.7.1
> > > smtp;550 5.7.1 Unable to relay" error message.
> > > How can we solve the problem?
> > >
> > > Best Regards
> > > Cicek
> >
> >
> >
.

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