Re[4]: [vps-mail] Dramatic increase of SPAM during last days

[Abigail Marshall <abigail@xxxxxxxxxxxx>]

GS> On Tue, 24 Aug 2004 17:20:56 -0700, Abigail Marshall <abigail@xxxxxxxxxxxx>
GS> wrote:

>> Not true - if your DSL is on the blocklist, and you try to
>> send mail via your VPS, it will be blocked by sendmail.

GS> I disagree.

Godwin, I don't know what you are doing, but I have my
servers configured to ONLY allow SMTP AUTH; I've got a
dynamic PPPoE connection with a changing IP, and my ISP's
numbers are frequently listed in list.dsbl.org - I find out
when I boot up my computer first thing in the morning and
try to send an email & get a block message. (As I noted
before, all I have to do is whitelist it in access to fix
it).

Also, if I add a specific domain name to the access block
list, then I can't send mail to it via the VPS any more. So
for example, let's say I add spammer.net to the blocklist,
and then decide to also send spammer.net an email to tell
them to leave me alone. I can't do it via the VPS. (I have
to remind myself to send the email first, and then add the
blacklist entry -- I wouldn't waste my time emailing major
spammers, but occasionally I'm getting spam-type email from
a clueless real person who thinks that's the way to sell his
services, so I sometimes do notify them when I am
blocklisting).

I have a VPS2. These are the lines of the mc file re SMTP
authorization - is there a mistake in the configuration?

dnl SMTP AUTH configuration for relaying through server
define(`confAUTH_MECHANISMS',`PLAIN LOGIN')
TRUST_AUTH_MECH(`PLAIN LOGIN')


-Abigail

GS> I just added a blocklist I know that I'm on (blackholes.five-ten-sg.com -
GS> who isn't on that one? :o) ) to my sendmail configuration and checked my IP
GS> wasn't whitelisted anywhere.

GS> Sending mail to a local account with no authentication was blocked.

GS> Relaying mail using SMTP AUTH worked.

GS> As I said, the use of SMTP AUTH overrides blocklists. This is one of the two
GS> purposes of SMTP AUTH:

GS>   1) Prevent unauthorised use of the MTA
GS>   2) Allow authorised use of it regardless of blocklists etc.

GS> These tests were done on a VPS2.

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