I have also been having trouble with my Swiss provider (hosttech) making
such insane spam rejections.
1. Recently I travelled to Germany, and stayed at a hotel using Deutsche
Telekom as broadband provider.
Apparently the entire DT DSL pool appears on two blacklists, so Hosttech
just ignore them. No error message is returned, just a timeout -- a
behavior so typical of Swiss bureaucracy. I got around this by using Google
or GMX to send my mails. Hosttech first tried to tell me my settings were
wrong (not likely), but finally had to confess that they were the problem.
2. Some time ago, I sent an email message containing the name of a Rumanian
colleague in the body. That time I got an error message saying 'This server
doesn't like spam.' I took the Rumanian name out, left everything else the
same (except the recipient address, as the mail no longer made sense to the
original recipient) and the mail went through fine.
Concerning the first problem, Hosttech claim they fear getting on blacklists
themselves, or that evil scripts might get uploaded to the SMTP server.
I've never heard of such a thing, but even if it were true, since they use
SMTP-Auth, isn't it enough to insist that the SMTP-Auth credentials are
restricted to users who don't send spam, and to block the credentials of
those who do? Why make something simple so bureaucratically difficult and
obnoxious?
To expect a user travelling on business to drop everything in their busy
schedule to get IP addresses out of a DSL pool removed from blacklists by
contacting a local broadband administration with whom they are not customers
strikes me as completely unreasonable.
Charles Buckley
-Original Message-
From: swinog-boun...@lists.swinog.ch [mailto:swinog-boun...@lists.swinog.ch]
On Behalf Of Jeroen Massar
Sent: 18 March, 2016 10:03
To: swinog@lists.swinog.ch
Subject: Re: [swinog] Reject von hotmail.com
On 2016-03-18 09:47, Franco Hug wrote:
> Hoi zaema,
>
> Ich beobachte das gleiche Verhalten mit contabo.de, aus dem Netz
178.238.224.0/22, evtl. gar 178.238.224.0/20 ...
>
>> DE-GIGA-HOSTING-20100728 178.238.224.0 - 178.238.239.255
>> CONTABO 178.238.224.0 - 178.238.227.255
>
> Da scheint das ganze Netz auf einer Migro$oft Blacklist gelandet zu sein.
>
>> 550 SC-001 (BAY004-MC3F37) Unfortunately, messages from
>> 178.238.227.40 weren't sent. Please contact your Internet service
>> provider since part of their network is on our block list. You can also
refer your provider to
http://mail.live.com/mail/troubleshooting.aspx#errors.
>
> Bei den einschlaegig bekannten blacklists ist das Netz auf jeden Fall
nicht gelistet.
>
> In der Tat hatte ich selbst innerhalb der letzten 3 Monate 1x ein
Spam-Mail aus diesem Netz erhalten.
> Eigentlich nichts Aussergewoehnliches, hin und wieder flutscht halt
> mal was durch bei diesen grossen Providern. Dass deswegen ein ganzes
> Netz gelistet wird, und somit auch Unschuldige betroffen sind, ist
aergerlich. Umso mehr, weil nicht wirklich klar ist, was man genau tun muss,
um das Problem zu beheben.
Registriere bei postmaster.live.com ... (yep, und auch bei google etc, die
grossen haben kein lust um spam zu empfangen, so schieben sie das auf der
ISPs die gerne mail wollen schicken)
Richtige WHOIS, reverse DNS, SPF + DKIM und naturlich funktionierende abuse@
und abuse mail auch richtig behandeln.
abuse-c oben ist ab...@contabo.de und wann dort sage 50 /24s hin gehen und
aus der 50, 1 /24 viel spam geschickt werde und abuse@ das nicht losst, dan
werd gleich die andere 50 auch als 'reagiert nicht' markiert, also.. rufe
deine ISP an und frage mal nach ob die abuse behandeln...
Greets,
Jeroen
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