Mweb (Ignite) and Mailmarshal

[Ice2Cool]

Hey guys

I require some advise please. So my Isp for my work is currently with Mweb - now called Ignite. It's a business uncapped adsl account. They also provide us with mailmarshal for our exchange server which is to control spam. We are having perpetual problems where legitimate emails are being blocked from our customers and we have no way of knowing this until a customer phones us and asks why we aren't responding to emails. Currently we receive no notification from mweb that an email has been blocked so we are none the wiser. Our IT is outsourced and they check the blocked emails periodically and release emails which they believe are legitimate but sometimes urgent emails can remai blocked for several days.

We have asked mweb to reduce the threshold on the spam filtering so that these emails do not get blocked but they have refused. Most of my customer emails come from large companies and who's IP addresses get flagged as spammers and thus get blacklisted. So mweb says the spam filter is doing its job.

Obviously this now puts me in a situation - do I live with this problem, convince mweb to lower the threshold, etc or what?

If I have to change ISP - what other spam blocking services are offered? Should I be doing spam filtering on my own network or is t better to have it done by the isp? I am not an IT person so my knowledge in these areas are limited and my IT company is either being complacent in helping me find a way forward or they are none the wiser as to what to do.

Thanks

 

[Grimis]

Greets

When using MailMarshal the first thing would be to do is request the manager of the software (mweb) create a rule that looks like follows:
Where message is Incoming
Where addressed to *your domain*
and
where from *your customer domain(s)*
Passthrough the message without scanning.

This isnt the safest but is fine if you know how to tell crap from valid mail.
You would need to have this rule updated as you onboard more customers.

It would also be good practice to have SPF records for yourself and all your customers, mweb can then also setup SPF rules which will weed out spoofed mails and various other spam practises (addressed from your domain to your domain but not via your mail server).

This is very straight forward.
Hope it helps.

Cheers