[horde] IMP 6.1.5 Can't send a message via smtp (issue with HEHLO error 502)

Steffen skhorde at smail.inf.fh-bonn-rhein-sieg.de
Wed Nov 20 13:29:04 UTC 2013


On Wed, 20 Nov 2013, Robert Schetterer wrote:

> Am 20.11.2013 07:49, schrieb Andreas Schulze:
>>
>> Zitat von Michael M Slusarz <slusarz at horde.org>:
>>
>>> SMTP servers have REQUIRED EHLO support since RFC 2821 -- issued April
>>> 2001.
>>
>> It's not a server failure. It's a cicso security device 'protecting' the
>> server.
>>
>> 'Protection' is done by masking the initial 220 line. Nearly anything is
>> replaced by '*'
>> An SMTP Client can't find the string 'ESMTP' and has to fall back to
>> RFC821.
>> For Cisco that is 'secure' ...
>
> to be fair ,mostly its about helpless admins who cant configure pix
> or didnt update, some problems are known for years

sadly to say:
you can get Cisco routers configured "secure" like that by paid external 
Cisco Certified Engineers [don't know the correct title]. ... .

-- 
Steffen


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