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various questions on Anti Spam

Hi,

I'm realatively new to the Astaro and have been digging around to get myself up to speed, specifically for the Anti Spam side of things.  I've had a dig through the forum but have struggled to find answers and was wondering if someone could help answer my questions or point me in the right direction.

Our MX is with the ISP and they relay the mail down to us.  We have the ISP's servers listed in "Relaying" and "Allow upstream/relay hosts only" is selected.

1 Should greylisting be switched off?
- My thought was that this will only cause delays in receiving email from the ISP but I'd like someone that knows more than me to confirm this!

2 The same question applies to "Reject invalid HELO / missing RDNS"
- I'm not sure if this function looks back through all the headers or if it just applies to the SMTP connection?

3 I read in a few posts that removing the expression filters can help.
-At the moment I have 2 words in there and was wondering if I need to enclose them in speach marks?

4 Is it possible to reconfigure the bounce message that the sender of a blocked email would receive?
-Currently if a client sends us something and it gets blocked they get this...
~#~
  ----- The following addresses had permanent fatal errors -----

   (reason: 550 Administrative prohibition)

  ----- Transcript of session follows -----
... while talking to astaro.***.co.uk.:
>>> DATA
me@***.co.uk
Action: failed
Status: 5.2.0
Remote-MTA: DNS; astaro.***.co.uk
Diagnostic-Code: SMTP; 550 Administrative prohibition
Last-Attempt-Date: Wed, 24 Feb 2010 13:13:01 GMT
~#~
I'd like to customise the diagnostic code as "550 Administrative prohibition" doesn't help the majority of our clients.

With a bit of luck my screen shots will come through.

AntiSpam01.jpg
AntiSpam02.jpg
AntiSpam03.jpg

Thanks in advance,

Greg

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0 gerg over 15 years ago

Thanks for the info Bob.
With my limited knowledge I'd suspect that the Astaro can't talk to anything unless it's in the upstream host list?  I'm only guessing tho

1&2 isn't done by the ISP, we use it to mask port 25 on our astaro.

3 So no "" required then, just slap the words in the expression filter?  I don't suppose you have a link to any of the advanced phrases that can be used?  An example would be adding cia to the expression filter and it then blocking speCIAlist.  I suspect it's more clever than that tho?

4 The bounce was something I sent from my hotmail to the domain behind the Astaro.  The email had a subject of "Test" and in the body all it said was "test".  Unfortunately it got bounced!  Sometimes we send an email to a client with a proposal and they just reply with "yes" or "proceed as agreed"

Cheers,
Greg
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0 gerg over 15 years ago

Thanks for the info Bob.
With my limited knowledge I'd suspect that the Astaro can't talk to anything unless it's in the upstream host list?  I'm only guessing tho

1&2 isn't done by the ISP, we use it to mask port 25 on our astaro.

3 So no "" required then, just slap the words in the expression filter?  I don't suppose you have a link to any of the advanced phrases that can be used?  An example would be adding cia to the expression filter and it then blocking speCIAlist.  I suspect it's more clever than that tho?

4 The bounce was something I sent from my hotmail to the domain behind the Astaro.  The email had a subject of "Test" and in the body all it said was "test".  Unfortunately it got bounced!  Sometimes we send an email to a client with a proposal and they just reply with "yes" or "proceed as agreed"

Cheers,
Greg
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