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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...How to avoid spam blacklist and spambot problemsHow to avoid spam blacklist and spambot problems
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2/26/2011 12:41 AM
 
Rodney Joyce


www.pokerdiy.com
Joined: 4/28/2004
Posts: 2796
Hi,

My site sends around 200-300 emails a day. I get a lot of bogus sign up accounts so these emails bounce back to me. I use the 2 layer validation system so users cannot post content on PokerDIY unless they verify their email address.

However, in the last month or so I have been blacklisted 5 times (every few days) in the CBL. I can delist my IP but it says doing this too many times will cause a perm. ban.

I don't know what else I can do - I sign my outgoing mail with a Domain Key and I have a SPF record so you can only send from pokerdiy.com.

With the latest blacklisting it now says I am infected with a spambot:
This IP is infected (or NATting for a computer that is infected) with a spambot we have not yet been able to identify.
For the time being we refer to it as the unknown23 spambot.


Any suggestions appreciated...

Entrepreneur

PokerDIY Tournament Manager - PokerDIY Tournament Manager<
PokerDIY Game Finder - Mobile Apps powered by DNN
PokerDIY - Connecting Poker Players
 
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2/26/2011 4:11 AM
 
Wes Tatters


Wes Tatters's Avatar

Joined: 4/30/2004
Posts: 2155
It seems rather odd that you would be black listed for sending 200-300 emails a day - assuming that these emails are basically authentication emails.

Are you sure you have not allowed other users access to your mail server in any way.  I would start by looking at your email server send logs to ascertain how many emails are being sent each day - and more specifically how many emails are being set to known target servers like hotmail and yahoo and gmail.

Westa
 
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3/4/2011 5:25 PM
 
Rodney Joyce


www.pokerdiy.com
Joined: 4/28/2004
Posts: 2796
Thanks Wes, I looked into this more (and the good guys at PowerDNN helped analyse the logs). I have now removed everything except new user sign up emails. My mail server is now sending around 100-200 mails a day - all just the new user signups. A lot of them bounce (no known user etc. as they are bot spammers but every 3 days like clockwork my IP gets banned and I have to have it delisted).

I have checked my domain keys, spf records and you need to log on to send mail. AOL and a few others are just not liking my poker theme!

Any other ideas please? I'm running out...

Entrepreneur

PokerDIY Tournament Manager - PokerDIY Tournament Manager<
PokerDIY Game Finder - Mobile Apps powered by DNN
PokerDIY - Connecting Poker Players
 
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3/4/2011 6:13 PM
 
Wes Tatters


Wes Tatters's Avatar

Joined: 4/30/2004
Posts: 2155
I have been here once in the past with a client ... once and IP does manage to get blacklisted .... it only takes a couple of reports from places like AOL that you are sending bounced emails ... to retrigger the blacklisting.

Assuming you have done all the right things on your server you pretty much come down to a choice of request a new IP address for your mail server - if not your entire hosting - and secondly possibly even a new domain name for your mail server - something similar like pokermail.com or some such

Westa
 
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3/7/2011 10:48 PM
 
Tony Valenti


www.PowerDNN.com
Joined: 1/17/2006
Posts: 567
Hi Rodney!
Yes - it is true that, unfortunately, it is really hard to keep from being blacklisted when sending out emails like that.  Something that I have seen people do with moderate success is require that people's usernames be their email addresses (though something like DynamicForms) and then having a captcha and a validation email send to the user as well.
Tony Valenti
Tony.Valenti@PowerDNN.com
+001-402-650-6072

PowerDNN.com - World Leader in DotNetNuke Hosting and DNN Hosting
DNN Hosting Australia - DNN Hosting Europe - DNN Hosting US
 
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