RE: [cobalt-users] TMDA

["Pablo Jejcic" <pablo.jejcic@xxxxxxxxxxxxxxxxxx>]

Thanks a lot, very informative.

I'm not going to install TMDA, and I will try to manage the spam with
spamassasin, but it is only stoping like half of thesapm we get....

Nevermind... I will try to get spamassasin to work better.

Thanks a lot again.-

Pablo­.-

->-----Original Message-----
->From: cobalt-users-admin@xxxxxxxxxxxxxxx 
->[mailto:cobalt-users-admin@xxxxxxxxxxxxxxx] On Behalf Of Jeff Lasman
->Sent: 14 December 2003 04:59
->To: cobalt-users@xxxxxxxxxxxxxxx
->Subject: Re: [cobalt-users] TMDA
->
->
->On Friday 12 December 2003 01:31 am, Pablo Jejcic wrote:
->
->> Did anyone give a try to http://tmda.net/ ?
->>
->> I'm thinking of installing this on my Cobalt Qube3, but if 
->anyone have 
->> negative thought I will not... ;)
->
->While this particular implementation of challenge/response happens to 
->have some interesting additional features, challenge/response is 
->basically a flawed method for dealing with email, as it requires 
->unknown senders to do something extra to get email to you.
->
->For example, if you install this on your server, all your users will 
->find their mailing list subscriptions will no longer work.  In fact 
->many mailing lists now immediately automatically unsubscribe 
->anyone who 
->sends a challenge/response email, and if those emails get back to 
->senders they generate a lot bad will.
->
->Yes, you can set up tagged addresses so your mailing list email (for 
->example) will get through, but unless you install tmda.cgi 
->you'll have 
->to manage this for all your users.
->
->And if you do try to install tmda.cgi, note (from the documentation) 
->that it only works as is on qmail servers.  The RaQ uses 
->sendmail, not 
->qmail.
->
->In any event, even if you do get tmda.cgi working, your users 
->will have 
->to unsubscribe from, and resubscribe to, all their mailing lists, 
->between the time you install tmda and the time they post to any list 
->for the first time.
->
->Not to mention the same problem occurring with every 
->form-to-email page 
->running on your server; they'll need to be changed as well, or you'll 
->need to know of all of them, and create whitelist entries yourself.
->
->One of my clients installed a challenge/response system for his main 
->domain and didn't notice the problem with form-to-email until 
->he'd lost 
->a lot of business.
->
->Jeff
->-- 
->Jeff Lasman, nobaloney.net, P. O. Box 52672, Riverside, CA  
->92517 US Professional Internet Services & Support / 
->Consulting / Colocation Our blists address used on lists is 
->for list email only Phone +1 909 324-9706, or see: 
->"http://www.nobaloney.net/contactus.->html"
->
->
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