Mailing List CGatePro@mail.stalker.com Message #105690
From: Thomas Bleek <bl@gfz-potsdam.de>
Subject: Re: "Too many hops"?
Date: Thu, 11 Jun 2015 20:06:07 +0200
To: Discussions Pro CommuniGate <CGatePro@mail.stalker.com>
X-Mailer: Apple Mail (2.2098)
Why do you not simply whitelist this strange site???
tb
Am 11.06.2015 um 19:53 schrieb James Moe <jimoe@sohnen-moe.com>:

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On 06/10/2015 09:47 AM, James Moe wrote:
Mailchannels.net [...] is also somewhat broken. For no obvious
reason it bounces the message back and forth between the itself and
the originating sender [...]

 Thank you for pointing me to the location of the "hops" setting.

 The problem is IMO a bad choice for the retry setting in
Mailchannels' MDA.
 We use a greylisting function that is highly effective at blocking
spam, especially dictionary attacks. If the IP address is not
recognized, the proxy sends a "451 - retry later". Almost all MDAs
retry 1 minute, 5 minutes, 30 - 90 minutes later.
 Mailchannels retries immediately after each 451 response. And adds a
block of header entries after each retry until the proxy's delay timer
runs down, which is set (luckily) at 1 minute. The result is a header
chock full of garbage. It usually takes 10 - 15 retires by
Mailchannels to get the message through. Hence the rejection by CGPro.
 I increased the limit to 30 "hops" which is enough to allow
Mailchannels-damaged mail to come through.

- --
James Moe
moe dot james at sohnen-moe dot com
520.743.3936
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--
Dr. Thomas Bleek, Netzwerkadministrator
Helmholtz-Zentrum Potsdam
Deutsches GeoForschungsZentrum
Telegrafenberg A20/225
D-14473 Potsdam
Tel.: +49 331 288- 1818/1681 Fax.: 1730 Mobil: +49 172 1543233
E-Mail: bl@gfz-potsdam.de

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