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497 posts

Ultimate Geek


  # 1677103 24-Nov-2016 23:34
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That is pretty clear - you successfully connected to the SMTP server and it sent back a 421 message and disconnected you.  So you do not seem permitted to use the SMTP server for some reason.


1537 posts

Uber Geek

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2degrees

  # 1677242 25-Nov-2016 09:40
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Hi there Rayonline,

 

Can you please message us with your 2degrees account number so we can check this out for you?

 

Thanks,

 

Ralph ^JOB


 
 
 
 


152 posts

Master Geek


  # 1677249 25-Nov-2016 09:53
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fe31nz:

 

That is pretty clear - you successfully connected to the SMTP server and it sent back a 421 message and disconnected you.  So you do not seem permitted to use the SMTP server for some reason.

 

 

SMTP is also used for receiving mail, so it needs to be open to the whole internet. It's unlikely that this message is coming from the server...


1423 posts

Uber Geek


  # 1677260 25-Nov-2016 10:18
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You're not connecting through a work or personal VPN are you?



1648 posts

Uber Geek


  # 1677265 25-Nov-2016 10:36
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No just at home.  I don't use VPN etc ... 


497 posts

Ultimate Geek


  # 1677463 25-Nov-2016 14:58
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sorceror:

 

fe31nz:

 

That is pretty clear - you successfully connected to the SMTP server and it sent back a 421 message and disconnected you.  So you do not seem permitted to use the SMTP server for some reason.

 

 

SMTP is also used for receiving mail, so it needs to be open to the whole internet. It's unlikely that this message is coming from the server...

 

 

The telnet test showed that rayonline was indeed receiving the 421 message from the SMTP server.

 

Not all SMTP server are set up to receive emails - some are set up for sending only.  In any case, all the email servers I have ever met have configuration that allows the sending of emails to non-local addresses ("forwarding") to be restricted by various rules, so that the server can not be used for that except by authorised users.  If it is set up to receive emails, these days it will normally accept a connection from only sources that are likely to be legitimate SMTP servers, not spambots.  So, for example, it is likely to deny access to any address that seems to be an another ISP's customer IP address, rather than their SMTP server address.  When it comes to forwarding emails from IP addresses inside the SMTP server's own ISP network, different ISPs have different policies.  Some allow all their IP addresses to have access to the SMTP server - that is the most common setting as most customers have a need to send emails.  However, to help prevent spambots from malware infected customer PCs, some ISPs block connections to SMTP server port numbers other than their own SMTP servers.  This can be just inbound connections, or both directions.  So if you run your own SMTP server (as some businesses do), you would then need to ask to have the SMTP ports unblocked for your SMTP server IP address.  2Degrees does not do this - it allows access to all ports in both directions, which is one reason I chose to join Snap when I moved to a fibre connection and my old ISP could not do fibre for me.

 

I run my own SMTP server, which receives incoming emails directly on port 25, but blocks all attempts to forward emails through it to other email addresses.  Such attempts happen daily.  But I do not try to send emails directly from my own SMTP server, as the other SMTP servers around the world do not know that my static IP address is a legitmate SMTP server, and will tend to not accept emails from it.  So I have my SMTP server set up to forward all outgoing emails via smtp.snap.net.nz, which it does for me without any problems.  I do have SPF records in my DNS to say that emails from my domain are sent via smtp.snap.net.nz, which tells the rest of the world's SMTP servers that emails from my domain being sent from that server are legitimate.


436 posts

Ultimate Geek
Inactive user


  # 1677548 25-Nov-2016 18:09
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sbiddle:

 

In all seriousness you should move away from STMP and POP3. There is no valid reason for still using 1970's protocols. Most people want their email on multiple devices these days and archaic protocols such as these simply can't offer that.

 

(And nobody mention keeping POP3 mail on a server - that *always* ends in tears at some point)

 

 

 

 

 

 

LOL wut? Maybe because that 1980s SMTP protocol is the still the standard for sending email? Just like that 1990s protocol used for web browsing.

 

 


 
 
 
 


28589 posts

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Biddle Corp
Lifetime subscriber

  # 1677602 25-Nov-2016 19:23
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vulcannz:

 

sbiddle:

 

In all seriousness you should move away from STMP and POP3. There is no valid reason for still using 1970's protocols. Most people want their email on multiple devices these days and archaic protocols such as these simply can't offer that.

 

(And nobody mention keeping POP3 mail on a server - that *always* ends in tears at some point)

 

 

 

 

 

 

LOL wut? Maybe because that 1980s SMTP protocol is the still the standard for sending email? Just like that 1990s protocol used for web browsing.

 

 

 

 

Standard for sending email? It really depends what you mean by that. The vast majority of people these days rely on webmail or are using services like Gmail, Yahoo or Outlook.

 

Yes I know SMTP is still the bearer of email across the internet. I work with that every day. It and POP3 should however be made obsolete as a way for individuals to connect to mail platforms because they cause so many issues and are incredibly inflexible in a world where people want mail across multiple devices.

 

 

 

 

 

 


152 posts

Master Geek


  # 1677642 25-Nov-2016 20:49
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fe31nz:

 

sorceror:

 

fe31nz:

 

That is pretty clear - you successfully connected to the SMTP server and it sent back a 421 message and disconnected you.  So you do not seem permitted to use the SMTP server for some reason.

 

 

SMTP is also used for receiving mail, so it needs to be open to the whole internet. It's unlikely that this message is coming from the server...

 

 

The telnet test showed that rayonline was indeed receiving the 421 message from the SMTP server.

 

Not all SMTP server are set up to receive emails - some are set up for sending only.  In any case, all the email servers I have ever met have configuration that allows the sending of emails to non-local addresses ("forwarding") to be restricted by various rules, so that the server can not be used for that except by authorised users.  If it is set up to receive emails, these days it will normally accept a connection from only sources that are likely to be legitimate SMTP servers, not spambots.  So, for example, it is likely to deny access to any address that seems to be an another ISP's customer IP address, rather than their SMTP server address.  When it comes to forwarding emails from IP addresses inside the SMTP server's own ISP network, different ISPs have different policies.  Some allow all their IP addresses to have access to the SMTP server - that is the most common setting as most customers have a need to send emails.  However, to help prevent spambots from malware infected customer PCs, some ISPs block connections to SMTP server port numbers other than their own SMTP servers.  This can be just inbound connections, or both directions.  So if you run your own SMTP server (as some businesses do), you would then need to ask to have the SMTP ports unblocked for your SMTP server IP address.  2Degrees does not do this - it allows access to all ports in both directions, which is one reason I chose to join Snap when I moved to a fibre connection and my old ISP could not do fibre for me.

 

I run my own SMTP server, which receives incoming emails directly on port 25, but blocks all attempts to forward emails through it to other email addresses.  Such attempts happen daily.  But I do not try to send emails directly from my own SMTP server, as the other SMTP servers around the world do not know that my static IP address is a legitmate SMTP server, and will tend to not accept emails from it.  So I have my SMTP server set up to forward all outgoing emails via smtp.snap.net.nz, which it does for me without any problems.  I do have SPF records in my DNS to say that emails from my domain are sent via smtp.snap.net.nz, which tells the rest of the world's SMTP servers that emails from my domain being sent from that server are legitimate.

 

 

he would get a different error if the issue was with mail relaying - the server would allow the connection in the first place.

 

as I mentioned earlier, i don't believe the message is coming from the server as the message says the server refused the connection - if i was to guess i would say a load balancer generated it.

 

as to why - maybe he's been specifically blacklisted by 2degrees?


22894 posts

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  # 1677645 25-Nov-2016 20:53
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Usual cause for 10061 when I was stuck helpdesking was antivirus going broken and partially intercepting things.




Richard rich.ms



1648 posts

Uber Geek


  # 1681215 2-Dec-2016 12:05
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richms: Usual cause for 10061 when I was stuck helpdesking was antivirus going broken and partially intercepting things.

 

 

 

I will just use the Yahoo's outgoing server. 

 

I disabled AVAST for 1hr and it failed.  I disabled AVAST (permanently) and restarted the computer.  Still failed. 

 

I used smtp.snap.net.nz port 25 without encryption as well as port 465 with SLS.  

 

 

 

Edit.  Also disabled my Windows Firewall with AVAST disabled.  Same result.


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