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-bounces@lists.swinog.ch [mailto:swinog-bounces@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 abuse@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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