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7 posts

Wannabe Geek


  #622689 10-May-2012 09:28
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AartJansen: So RDNS is like NSlookup ?


The "principals" are the same - more like DNS (in reverse).
Where DNS will resolve a name to an IP, RDNS will resolve an IP to a name. RDNS is frequently used by many systems to verify the source of the Email by "double checking" with RDNS that the Email sent was actually coming from the Domain.
NSLookup is a command used to place a query against a DNS Server.
Google "reverse dns lookup" and use one of the many free services to see the results.

For example (IP has been changed to protect our our customer's identity):

210.99.99.199 resolves to "210-99-99-199.adsl.xtra.co.nz"
Top Level Domain: "co.nz

When you get your ISP to create a RDNS record for you system, the result should be this instead:
210.99.99.199 resolves to "210-99-99-199.mybusiness.co.nz"Top Level Domain: "co.nz

This way, a receiving Email system can verify that it is coming from the actual Mail Server that sent the Email and not the Blacklisted system.

1949 posts

Uber Geek

Subscriber

  #625640 15-May-2012 18:47
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Seems like theres still an issue !

Someone I know is trying to send me email from their xtra account to my ihug account.
No go and the reason is the same as the first message in this thread.

Nice.


 
 
 
 


4 posts

Wannabe Geek


  #625728 15-May-2012 20:36
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I sent around 20 business-related email today, starting at 7.59 this morning.  They are only now (after 8.30 pm) being received by the recipients.  I could receive email but outgoing email didn't reach their destinations.  Many were time-sensitive, and there was no indication on my end that there was a problem. 

If Xtra had this problem a week ago, why is there such an extreme recurrence of the same problem again today?

22 posts

Geek


  #626104 16-May-2012 13:28
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So I have set up RDNS on my xnet account, with an email to support@xnet.co.nz, they did it in about 24 hours .

At the same time I sent an email to support@xtra.co.nz asking the same thing for one of my clients, no response at all.

Anyone know how to get something like RDNS setup with xtra as your ISP ?

5 posts

Wannabe Geek


  #626280 16-May-2012 16:42
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I used to have Telecom's Complex Support email and they used to do my RDNS requests quite quickly. Things is I lost this email, does anybody have it?

If you don't want to post here, you can always PM

15889 posts

Uber Geek


  #626283 16-May-2012 16:44
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MandyKoo: I sent around?20 business-related email today, starting at 7.59 this morning.? They are only now (after 8.30 pm) being received by the recipients.? I could receive email but outgoing email didn't reach their destinations.? Many were time-sensitive, and there was no indication on my end that there was a problem.?

If Xtra had this problem a week ago, why is there such an extreme recurrence of the same problem again?today?


They do have a problem, I read about it on stuff or the nzherald today.

15 posts

Geek


  #626632 17-May-2012 07:39
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Looks to be the normal thing

Someone using telecom gets an infection (or deliberately) and gets to spamming.
the spam gets reported
Spam blocklists start listing Telecom/Xtra SMTP servers as the source of the SPAM
mail servers using these lists start defering/rejecting mail from telecom/xtra mail servers due to the listing
Mail server staff contact spam block lists to get removed, takes time.
Telecom/Xtra staff gets raged at.
rinse, repeat. :)

 
 
 
 


1876 posts

Uber Geek


  #626755 17-May-2012 12:01
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What's all this mention of "smart hosts"? Is this some sort of hosting that I haven't heard of before? I see it mentioned here in the same sentence as Discount Domains, but aren't they a domain registrar? Or is "smart host" just another name for a domain registrar?

22 posts

Geek


  #626760 17-May-2012 12:17
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a smart host, is a microsoft term in their SBS suite of servers. theres a wizard that refers to smart host, effectively a smarthost provides a smtp server for you to forward email to and it "smartly" handles the DNS delivery. The wizard then configures the exchange server accordingly.

It would seem the more modern anti-spam measures don't appreciate this set up anyway, and using the SBS's built in DNS resolution seems to work well, if you take the added measures of setting up RDNS & SPF records.

1876 posts

Uber Geek


  #626763 17-May-2012 12:20
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AartJansen: a smart host, is a microsoft term in their SBS suite of servers. theres a wizard that refers to smart host, effectively a smarthost provides a smtp server for you to forward email to and it "smartly" handles the DNS delivery. The wizard then configures the exchange server accordingly.


Ah, I see.  I'm not much into Microsoft SBS stuff, which is why I hadn't heard of the term before.  Thanks for the explanation!

3609 posts

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Trusted

  #627008 17-May-2012 18:58
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Does anyone know if there's still a problem with Xtra?  Yesterday I replied to an email only to receive a failure notice from MAILER-DAEMON@yahoo.com. 

Sorry, we were unable to deliver your message to the following address.

<XXXXXX@wave.co.nz>:
Mail server for "wave.co.nz" unreachable for too long
Is this likely to be a related problem to other posters on here?




Sony Xperia X running Sailfish OS. https://sailfishos.org The true independent open source mobile OS 
Samsung Galaxy Tab S3
Nokia N1
Dell Inspiron 14z i5


7 posts

Wannabe Geek


  #627021 17-May-2012 19:22
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Technofreak: Does anyone know if there's still a problem with Xtra?  Yesterday I replied to an email only to receive a failure notice from MAILER-DAEMON@yahoo.com. 

Sorry, we were unable to deliver your message to the following address.

<XXXXXX@wave.co.nz>:
Mail server for "wave.co.nz" unreachable for too long
Is this likely to be a related problem to other posters on here?


Yup... still ongoing...
Our customers are changing from Telecom to "alternatives" as fast as your heart is beating!

4 posts

Wannabe Geek


  #627034 17-May-2012 19:57
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Yes, the problem with Xtra which has affected me now for three days running, on and off, has severely damaged aspects of my new business, a transcription service, which relies heavily on getting completed work back to my clients within the hour.

I am definitely leaving Xtra.  I cannot afford to let this happen on an ongoing basis.  And I know that many others are affected too one way or another, even if they are not with Xtra themselves.

Not to mention that by the time email are reaching their destinations, because events have overtaken the content of the email, it leads to embarrassing and difficult situations, i.e. I called people in desperation for clarification on things that I wasn't receiving replies about, and then a day later when they receive the email that I sent before the call, they mistakenly think I am harrassing them, given that I have already spoken with them on the phone.

That is just one example of the extent of the damage that an unreliable internet provider can do to a fledgling business's reputation.  Once, yes, I can live with that.  But it's happening pretty regularly.  Today, for a period of about three hours, my email didn't appear to be reaching the recipients - YET AGAIN!

3609 posts

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Trusted

  #627059 17-May-2012 20:40
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It's unusual that there's been no comment on here from any of the Telecom people who frequent Geekzone.  It would be nice to hear from one of them as to what's going on.




Sony Xperia X running Sailfish OS. https://sailfishos.org The true independent open source mobile OS 
Samsung Galaxy Tab S3
Nokia N1
Dell Inspiron 14z i5


15889 posts

Uber Geek


  #627078 17-May-2012 20:59
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MandyKoo: Yes, the problem with Xtra which has affected me now for three days running, on and off, has severely damaged aspects of my new business, a transcription service, which relies heavily on getting completed work back to my clients within the hour.

I am definitely leaving Xtra.? I cannot afford to let this happen on an ongoing basis.? And I know that many others are affected too one way or another, even if they are not with Xtra themselves.

Not to mention that by the time email are reaching their destinations, because events have overtaken the content of the email, it leads to embarrassing and difficult situations, i.e. I called people in desperation for clarification on things that I wasn't receiving replies about, and then a day later when they receive the email that I sent before the call, they mistakenly think I am harrassing them, given that I have already spoken with them on the phone.

That is just one example of the extent of the damage that an unreliable internet provider can do to a fledgling business's reputation.? Once, yes, I can live with that.? But it's happening pretty regularly.? Today, for a period of about three hours, my email didn't appear to be reaching the recipients - YET AGAIN!


Simple solution is to buy a domain and get it independatly hosted, or get a free gmail address. Don't use your ISPs email system. It's free, and you get what you don't pay for. If you need email for business, you should perhaps use a paid hosted email service, and have a backup email account too. Businesses shouldn't use the free ISPs email accounts in my opinion.

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