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106 posts

Master Geek
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Topic # 215094 12-Jun-2017 13:06
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Anyone out their that can confirm this for me - I've just send a bunch of emails via SMTP.CLEAR.NET.NZ from my gmail address to my office 365 account and vice versa using a simply SMTP client and SMTP.CLEAR.NET.NZ has accepted them all and delivered them even though I'm a 2 Degrees Broadband user - This either means they are open relay or at the very least allowing downstream providers (I believe Snap use to get bandwidth from Vodafone - Not sure if they still do) or NZ ips to Relay.

 

This is incredibly helpful to spammers wanting to Reach NZ users?????

 

 


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106 posts

Master Geek
+1 received by user: 19


  Reply # 1798447 12-Jun-2017 13:09
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Just tried it from a client on Spark and they accepted and relayed that too - It would appear in their rush to "FIX" their email they have severely compromised their security - Anyone from Vodafone watching this forum!!!!

 

 


565 posts

Ultimate Geek
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  Reply # 1798449 12-Jun-2017 13:11
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Yes, will look into that




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1131 posts

Uber Geek
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  Reply # 1798450 12-Jun-2017 13:11
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There will be rate limits in place, not all that different from the old smtp.xtra.co.nz



106 posts

Master Geek
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  Reply # 1798451 12-Jun-2017 13:12
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As I said - I used a simple SMTP mail client on my pc and then the same client on a customers server who is with spark and smtp.clear.net.nz accepted both emails without Authentication and without the domains being managed by Vodafone/Clear




106 posts

Master Geek
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  Reply # 1798452 12-Jun-2017 13:14
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mobiusnz:

 

As I said - I used a simple SMTP mail client on my pc and then the same client on a customers server who is with spark and smtp.clear.net.nz accepted both emails without Authentication and without the domains being managed by Vodafone/Clear

 

 

The problem is an ISP's smtp server should only relay outbound email from a connection on their own network - smtp.clear.net.nz is accepting emails to be relayed outbound from other ISP networks - Yes rate limiting would stop me sending too much spam using the Open Relay but its still an Open Relay not a normal ISP Outbound Relay for their clients.

 

 


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Uber Geek
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  Reply # 1798456 12-Jun-2017 13:22
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mobiusnz:

 

mobiusnz:

 

As I said - I used a simple SMTP mail client on my pc and then the same client on a customers server who is with spark and smtp.clear.net.nz accepted both emails without Authentication and without the domains being managed by Vodafone/Clear

 

 

The problem is an ISP's smtp server should only relay outbound email from a connection on their own network - smtp.clear.net.nz is accepting emails to be relayed outbound from other ISP networks - Yes rate limiting would stop me sending too much spam using the Open Relay but its still an Open Relay not a normal ISP Outbound Relay for their clients.

 

 

 

 

As I recall these controls were put in place years ago when I was in TCL.... wonder what's happened for the control to have been reset....





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  Reply # 1798465 12-Jun-2017 13:34
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MXToolbox says it's an open relay.

 

ISP provided email...





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Uber Geek
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  Reply # 1798475 12-Jun-2017 13:57
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Pretty sure its been like this for a wee while.
As i recall telstra customers had no issues with SMTP when switching to Vodafone! (Back when the merger drama was going down with split billing systems etc etc)





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106 posts

Master Geek
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  Reply # 1798547 12-Jun-2017 15:10
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Looks like things are afoot - Now it just drops the connection before you get a chance to send any email - I guess thats valid enough - Just IP ban anyone not on network.


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