Outbound Port 25 Blocking

Forums › Spark New Zealand (including Skinny and BigPipe) › Outbound Port 25 Blocking

networkn

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#119320 28-May-2013 11:18

Anyone know if Xtra has enabled port 25 filtering on xtra dsl connections over the weekend? I have a bunch of clients calling to say they can't send email. Can't make a port 25 connection outbound at all.

Yes I have checked firewalls etc?

Zeon

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#826880 28-May-2013 11:19

I wouldn't be surprised, most ISPs are doing that these days and for good reason. I usually use port 26 or 587 for submission.

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#826882 28-May-2013 11:20

Zeon: I wouldn't be surprised, most ISPs are doing that these days and for good reason. I usually use port 26 or 587 for submission.

Well then WHY THE *&*^$&^&^(( don't they tell people before hand so it's not a reactive service to fix it!!

plambrechtsen

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#826889 28-May-2013 11:33

networkn:
Zeon: I wouldn't be surprised, most ISPs are doing that these days and for good reason. I usually use port 26 or 587 for submission.

Well then WHY THE *&*^$&^&^(( don't they tell people before hand so it's not a reactive service to fix it!!

Port 25 shouldn't have been blocked unexpectantly.

It is always blocked by default unless you specifically ask for it to be unblocked.

If it has got inadvertantly blocked again (which can happen when you change plan and the rep doesn't notice they are on the unblocked plan).

Ring up the broadband helpdesk on 0800 225598 and they should be able to sort it quickly.

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#826891 28-May-2013 11:36

plambrechtsen:
networkn:
Zeon: I wouldn't be surprised, most ISPs are doing that these days and for good reason. I usually use port 26 or 587 for submission.

Well then WHY THE *&*^$&^&^(( don't they tell people before hand so it's not a reactive service to fix it!!

Port 25 shouldn't have been blocked unexpectantly.

It is always blocked by default unless you specifically ask for it to be unblocked.

If it has got inadvertantly blocked again (which can happen when you change plan and the rep doesn't notice they are on the unblocked plan).

Ring up the broadband helpdesk on 0800 225598 and they should be able to sort it quickly.

So you are saying Port 25 is blocked OUTBOUND by default? This certainly isn't my experience. I know it's blocked INBOUND by default and if you run a mail server you require to request an unblock.

None of the customers would have made account changes recently, they wouldn't know how, they would ask us to help them with it.

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#826895 28-May-2013 11:41

networkn: So you are saying Port 25 is blocked OUTBOUND by default? This certainly isn't my experience. I know it's blocked INBOUND by default and if you run a mail server you require to request an unblock.

None of the customers would have made account changes recently, they wouldn't know how, they would ask us to help them with it.

Port 25 has always been blocked inbound and outbound on port 25.

It makes far more sense to block port 25 outbound as that is where your PC gets infected with with botnet software and is used to send spam. All of that is initiated outbound to port 25 on remote hosts. Hence why it would be blocked.
Rather than inbound, which would mean you have to open a pinhole on your router/firewall to allow inbound connections to port 25.

What could have happened is they could have been migrated from the old Broadband stack (FIPD) to the new one (BBA).

Again worth a call to the broadband helpdesk on 0800 225598 to get them to check.

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#826899 28-May-2013 11:47

Many SMTP servers also listen on port 465 for TLS/SSL access, that usually works even on providers that block port 25.

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#826900 28-May-2013 11:48

marpada: Many SMTP servers also listen on port 465 for TLS/SSL access, that usually works even on providers that block port 25.

Yep I know the solution is to move to the new ports, the problem is the lack of notification or courtesy from xtra.

plambrechtsen

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#826902 28-May-2013 11:57

networkn:
marpada: Many SMTP servers also listen on port 465 for TLS/SSL access, that usually works even on providers that block port 25.

Yep I know the solution is to move to the new ports, the problem is the lack of notification or courtesy from xtra.

I am happy to help, but you will get it sorted out faster than I can if you contact the broadband helpdesk.

The notification part is tricky, I am not sure what has happened or if you were part of the migration user set or what exactly happened. Again our support channels are in place to support you. Which you seem somewhat reluctant to use and ask questions on Geekzone where people may be able to help, but in many situations we can't (I certainly don't work on the helpdesk or have access into the production provisioning system that the reps have access to)

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#826906 28-May-2013 12:06

plambrechtsen:
networkn:
marpada: Many SMTP servers also listen on port 465 for TLS/SSL access, that usually works even on providers that block port 25.

Yep I know the solution is to move to the new ports, the problem is the lack of notification or courtesy from xtra.

I am happy to help, but you will get it sorted out faster than I can if you contact the broadband helpdesk.

The notification part is tricky, I am not sure what has happened or if you were part of the migration user set or what exactly happened. Again our support channels are in place to support you. Which you seem somewhat reluctant to use and ask questions on Geekzone where people may be able to help, but in many situations we can't (I certainly don't work on the helpdesk or have access into the production provisioning system that the reps have access to)

The thing that I emailed you about was nothing to do with this and was a result of being unable to get the helpdesk to deal with the issue I had properly and escalation not occuring as requested.

I posted here to see if it was a generally known issue. I have a solution that doesn't involve xtra support for these customers, it's just frustrating that xtra makes changes on an almost constant basis to it's mail platform and it's dsl services leaving customers wondering why stuff that has always worked suddenly stops.