Re: URGENT - No incoming mail
- From: "jtech" <jtech@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Fri, 2 Dec 2005 14:17:03 -0800
Looks like your an open relay, if your isp queues your emails, just block
all incomming smtp except from your isp.
also if you use smarthost then you might be blocked by your isp (outbound),
if you even send out 1 virus some isp's will just block you. (outbound)
-jtech
"Dave Bennett" wrote:
> Thanks again Ben!
>
> I can't understand why I'm being blacklisted really, I would have thought
> that I'd see serious activity on my exchange server if I had an account that
> had been compromised. But all seems to be working fine.
>
> senderbase.org shows my mail activity has increased 7266% for the last day!
> But I'm not sure if this a reflection of outbound mail or incoming, or
> both!? Obviously I have no control over incoming mail. Does anyone know
> how seriously I should take that figure?
>
> Also I have seen "proof" from spam blockers that show an email from
> blah@xxxxxxx sent via my domain. Is this possibly just a virus / spamware
> installed on a client machine?
>
> Thanks as ever!
> David (Much happier now mail is coming back in!!)
>
> "Ben Winzenz [Exchange MVP]" <ben_winzenz@nospamdotmessageonedotcom> wrote
> in message news:OvSgsS19FHA.356@xxxxxxxxxxxxxxxxxxxxxxx
> > It's easy to glance over things that may normally be obvious when in
> crisis
> > mode :-) Everyone does it.
> >
> > I don't believe that there is any more risk in sending via DNS instead of
> a
> > Smarthost. In fact, if you think about it, I'd say there is a greater
> risk
> > of an ISP's mail server being blocked than your server. If they are a
> smart
> > host for any of their customers, and even one of their customers begins
> > spamming, odds are that the ISP's mail server would quickly be
> blacklisted.
> >
> > As long as all your DNS ducks are in order, there is no problem with
> sending
> > that way. I'd say that the only situation where I would use/recommend
> using
> > an ISP's mail server as a smart host is if you were a small company that
> has
> > a dynamic IP.
> >
> > --
> > Ben Winzenz
> > Exchange MVP
> > MessageOne
> > Read my blog!
> > http://winzenz.blogspot.com
> > http://feeds.feedburner.com/winzenz (RSS Feed)
> >
> >
> > "Dave Bennett" <dave.bennett@xxxxxxxxxxxxxxxxxxx> wrote in message
> > news:uGus1L19FHA.1148@xxxxxxxxxxxxxxxxxxxxxxx
> > > Ben,
> > >
> > > You know when you look at something and read it, but don't actually READ
> > > it.
> > > Well I obviously did that because it BLATANTLY says "Only the list
> below"
> > > with a blank list!
> > >
> > > What an idiot.
> > >
> > > I've unchecked the allow all users box, I had previously done that but
> put
> > > it back on when everything stopped working! Also, I send my email via
> > > DNS,
> > > is this another reason I could be blacklisted by spam companies? I have
> > > heard that it is more sensible to send via my ISP's SMTP servers?
> > >
> > > Many many thanks!
> > > David
> > >
> > > "Ben Winzenz [Exchange MVP]" <ben_winzenz@nospamdotmessageonedotcom>
> wrote
> > > in message news:e$q4n009FHA.360@xxxxxxxxxxxxxxxxxxxxxxx
> > >> First, as to the settings:
> > >>
> > >> Access control looks good.
> > >>
> > >> Connection Control: Er, currently you aren't allowing any connections.
> > >> Change this back to "All except the list below", which is the default,
> > >> and
> > >> see if that doesn't clear up your problem.
> > >>
> > >> Relay restrictions look good, and you can't be used as an open relay.
> > >> The
> > >> only way that someone can use your server as a relay is if an account
> has
> > >> been compromised. If you do not have to support POP3 or IMAP users,
> you
> > > can
> > >> uncheck the "allow all computers which authenticate..." box.
> > >>
> > >> --
> > >> Ben Winzenz
> > >> Exchange MVP
> > >> MessageOne
> > >> Read my blog!
> > >> http://winzenz.blogspot.com
> > >> http://feeds.feedburner.com/winzenz (RSS Feed)
> > >>
> > >>
> > >> "Dave Bennett" <DaveBennett@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> > >> news:5916AE50-62B0-4598-A58A-FDF7D2338E69@xxxxxxxxxxxxxxxx
> > >> > Hi,
> > >> >
> > >> > I think I have a problem with my server being used as a relay -
> whilst
> > >> > investigating this problem I must have done something because now I
> > > cannot
> > >> > receive any messages INBOUND.
> > >> >
> > >> > I can still send out messages, but nothing is coming in. Can anyone
> > >> > please
> > >> > indicate what Imay have done - I don't actually think I made any
> > >> > CHANGES
> > >> > to
> > >> > any settings in Exchange, but the fact is I am definitely no longer
> > >> > receiving
> > >> > mail.
> > >> >
> > >> > Current settings (unticked if unless stated!)
> > >> > - Default SMTP server properties:
> > >> > Access control: Annonymous Access ticked
> > >> > Access control: Basic Authentication access ticked
> > >> > Access control: Integrated Windows Authentication ticked
> > >> > Connection control: Only the list below selected (list is empty)
> > >> > Relay restrictions: Only the list below selected (list is empty)
> > >> > Relay restrictions: Allow all computers which succ. auth. to relay,
> > >> > regardless of list
> > >> >
> > >> > - Message Delivery properties:
> > >> > No connection filtering
> > >> > No sender filtering
> > >> > No recipient filtering
> > >> > No ticks in any of the tabs
> > >> >
> > >> > Any advice would be greatly appreciated!
> > >> > Thanks,
> > >> > David
> > >>
> > >>
> > >
> > >
> >
> >
>
>
>
.
- References:
- Re: URGENT - No incoming mail
- From: Ben Winzenz [Exchange MVP]
- Re: URGENT - No incoming mail
- From: Dave Bennett
- Re: URGENT - No incoming mail
- From: Ben Winzenz [Exchange MVP]
- Re: URGENT - No incoming mail
- From: Dave Bennett
- Re: URGENT - No incoming mail
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