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Why does the MTA attempt to deliver IPv6 mail on port 24

My test XG has a IPv6 and 4 enabled. It quite happily sends mail out on port 25 using 'IPv4' addresses but tries to use port :: :24 for IPv6 deliveries.

I think I found out why and that is the way XG handles IPv6, not very well.

Ian

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0 lferrara over 7 years ago

Ian,

this is strange. Can you check which is the service that is using 24 port using this command:

netstat -lnptu | grep 24

You should find a line that contains :::24

Regards
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0 rfcat_vk over 7 years ago in reply to lferrara

Hi Luk,

the answer is awarrenmta. At this stage it is only the normal IP address because I have disabled IPv6, 127.0.0.1:24

Ian
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0 rfcat_vk over 7 years ago in reply to rfcat_vk

XG management mail is now stuck. Accepted by device for scanning and still using :: :24

Maybe a restart will let it see the world.

Ian
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0 lferrara over 7 years ago in reply to rfcat_vk

Ian,

I do not use IPv6 on my box so I cannot confirm the behaviour. It is strange that the same services listens on different port.

I would expect a 0.0.0.0:25 and not 2 different one for IPv4 and IPv6.

Regards
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0 rfcat_vk over 7 years ago in reply to lferrara

Hi Luk,

are you using MTA or the transparent proxy for mail?

Ian
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0 rfcat_vk over 7 years ago in reply to rfcat_vk

Here is a screen shot of the same command on an XG not running MTA

Ian
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0 rfcat_vk over 7 years ago in reply to rfcat_vk

Here is a screen shot of the same command on an XG not running MTA

Ian
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