[horde] Mails sent from Horde identified as spam on the sending server

[Volker Then]

Quoting Arjen de Korte <arjen+horde at de-korte.org>:

> Citeren Volker Then <horde40 at volkerthen.com>:
>
>> Hi,
>>
>> some of my messages sent with horde (webinterface or ActiveSync  
>> client) get already filtered as spam by the local spamassassin  
>> instance:
>>
>> Content analysis details:   (5.5 points, 5.0 required)
>>
>> pts rule name              description
>> ---- ----------------------  
>> --------------------------------------------------
>> 3.6 RCVD_IN_PBL            RBL: Received via a relay in Spamhaus PBL
>>                            [80.131.175.177 listed in zen.spamhaus.org]
>> 0.2 CK_HELO_GENERIC        Relay used name indicative of a Dynamic Pool or
>>                            Generic rPTR
>> 1.6 RCVD_IN_BRBL_LASTEXT   RBL: No description available.
>>                            [80.131.175.177 listed in  
>> bb.barracudacentral.org]
>
> Question is, why do you run SA on locally originating messages in  
> the first place? Occasionally, the systems of your users may get  
> infected by a spam sending trojan, but most of the time it is  
> pointless to check local messages for spam. In your case, I would  
> configure my mailserver to only run SA checks on messages entering  
> your system on port 25 and not the port your users use for  
> submitting messages (usually port 587).
>

Good question why my personal Horde installation still uses port 25  
(on the production system for my clients we use 587 already). ;-)  
Switched to port 587 and the issue got solved. Thanks Arjen, for the  
hint!