Heya

Another one on about the same topic.

Business Customer with own Mailserver. They ofter want to know, which of our 
mailservers they can use as smarthost. We usualy tell them, that they operate 
an own fully connected mailserver which does not need any smarthost to deliver 
email to the world.

Some do not agree. The reasons the tell us are:

- It Tech XY has told them that sending via a smarthost is much more reliable.
- Their previous ISP asked them to use it's smarthost.
- Our Server has better 'reputation' than theirs and thus emails are less 
likely to be considered spam by some spamfilters.
- Some seem to see DNS issues which I never could understand (they have 
correct PTR and MX settings for their mailservers).

The problems I see with smarthosting are:

- If an email to a recipient does not make it there, we get the blame even on 
trivias like 'user unknown'.
- We have to punch holes in the anti-spam thorttling measures to allow them to 
send more emails / time than the usual private customer does.
- They can generate huge load peaks if they operate newsletters and similar.
- They often do relay bounce emails for strange reasons, or cause mail loops 
which we do not want to be routed via our infrastructure.
- The risk that our infrastructure get's blacklisted because of trojan 
activities on a customers infrastructure increases.

So how do other ISP handle such requests? Do customer with an own fully 
connected mailserver have any reason to use their ISP's email infrastructure 
as smarthost?

Mit freundlichen GrĂ¼ssen

Benoit Panizzon
-- 
I m p r o W a r e   A G    -    
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Zurlindenstrasse 29             Tel  +41 61 826 93 07
CH-4133 Pratteln                Fax  +41 61 826 93 02
Schweiz                         Web  http://www.imp.ch
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