Re: Reason for mail sending fails ???
- From: calderara <calderara@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 13 Nov 2008 13:54:08 -0800
HI Brian, thnaks for youir reply
I guess even its along time you have not setup a sbs I think we are nealr
yon the right dirtection..
It is absolutly tue that time to time, some reciepient receive there email
and sometime not..And now that you are talking about black list for most all
home network IP...hmm I guess we nearly reach the point becasue today I just
try to send an email to a guy that I am sure the adress is valid and here is
what I get in return :
The following recipient(s) could not be reached:
john.mccormack@xxxxxxxxxxxxx on 11/13/2008 22:15
The e-mail system was unable to deliver the message, but did not report a
specific reason. Check the address and try again. If it still fails, contact
your system administrator.
< mail123-wa4-R.bigfish.com #5.0.0 X-Postfix; host
winse-6216-mail4.customer.frontbridge.com[131.107.115.212] said: 550 5.7.1
Email rejected because 91.172.8.39 is listed by sbl-xbl.spamhaus.org. Please
see http://www.spamhaus.org/query/bl?ip=91.172.8.39 for more information. (in
reply to end of DATA command)>
And of course I am sure about this adress.
WHat I have verify if the config of my SMTP connector and as I did not
change anything here, default settings is :
(*)Use DNS to route to each address space on this connector
So as I do not have a fixed IP adress, it means I have to use the other
option
(*) Forward all mail through this connector to the following smart hosts
right ?
And what should I place in ? same format as If I were setting the smtp
account on a normal email client ?
regards
serge
"Brian Cryer" wrote:
"calderara" <calderara@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message.
news:26E52AC0-F30F-45EF-A9C2-43BE87558483@xxxxxxxxxxxxxxxx
If POP 3 connector is only use to recieve email, how my email can be
delivered to my private mail box from my laptop outlook client through my
exchange server ?
What do you mean by smarhost ???
SBS has two ways of sending email:
The first is for each email SBS (or rather Exchange - the software running
on SBS) does the delivery itself. So it looks up the domain that the email
goes to, tries to contact the email server at that domain to deliver the
email, and retries if it was unsuccessful.
The second is to use a "smarthost". A smarthost is simply a way of
delegating the delivery to another server. Typically the smarthost is set up
to point to your ISP's SMTP server. Each time you send an email that email
is forwarded to the smarthost (i.e. your ISP) for delivery.
Out of the box I think it doesn't use a smarthost (but its been a while
since I last installed SBS). Somewhere along the way it may ask if you want
to use a smarthost, so if you entered your ISP's SMTP server then it might
be otherwise it won't.
However, in order to tell for sure which you are using try this:
Start > All Programs > Microsoft Exchange > System Manager
Expand "Connectors"
Right click "SmallBusiness SMTP connector" and select "Properties"
On the "General" tab you will have one of the following selected:
( ) Use DNS to route to each address space on this connector
(*) Forward all mail through this connector to the following smart hosts
Why might you want to use a smarthost? There are other reasons but typically
its if your IP address is on one or more blacklists (which it may be if its
a dynamic or domestic ip for example). A smarthost isn't always a good idea,
for example where I am now we don't use a smarthost because our ip isn't on
any blacklists (afaik) whereas our isp's smtp server is.
I think that answers both of your two questions.
Sorry for basic questionbut I am not familar with all this
Not a problem.
Now, my best guess a the cause of your problem:
I suspect that you are not using a smarthost, but your Exchange server is
sending out emails itself. Since (in a reply to Russ) you mentioned that
your SBS server is at home it is quite likely that your home IP address is
on one or more blacklists. Some blacklists list IP addresses that are
allocated for home internet connections. (The rational being that most home
users don't send emails directly but via their ISP so any emails coming from
a home internet connection are more likely to be spam.)
If your IP address is on a blacklist then some recipients will receive your
emails whilst others won't. Whether or not they receive your email depends
on which blacklists their email system uses.
The work around is simply to enable a smarthost and get your Exchange server
to use your ISP's STMP connection - this is the same connection that you
will have used before you installed SBS.
Hope this helps.
--
Brian Cryer
www.cryer.co.uk/brian
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