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Level 3: Gumshoe

Home email server + dynamic DNS over Telstra NBN: can send but cannot receive

Hi,

I've set up a raspberrypi with Postfix as a home email server (an experimental project); I'm using a dynamic DNS provider to link to my domain name.

I can send emails out from my raspberrypi Postfix mail server, and these are successfully delivered e.g. at my gmail account. When I reply to the received email, an error is returned: "The recipient server did not accept our requests to connect. "

Does Telstra not permit this set-up, or is the error something to do with my server and/or DDNS setup?

Thanks very much - Steven.

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Level 25: The Singularity
Level 25: The Singularity

Re: Home email server + dynamic DNS over Telstra NBN: can send but cannot receive

Have you set up Port forwarding in your modem to allow the incoming connection?

Also, don't use Port 25, use Port 587

Never be afraid to back yourself when trying new things, just always make sure you have 3 escape routes if things go wrong.
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Level 3: Gumshoe

Re: Home email server + dynamic DNS over Telstra NBN: can send but cannot receive

Hi, thanks for the quick response.

 

I had port forwarded 25, not 587; now added 587 and still no joy.

 

I'm following this tutorial (and have completed steps #1 and #2):

https://samhobbs.co.uk/2013/12/raspberry-pi-email-server-part-1-postfix

 

Thanks again for any further pointers you may have.

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Support Team
Support Team

Re: Home email server + dynamic DNS over Telstra NBN: can send but cannot receive

Hey _spc_, thank you for your post.

I am sorry for the troubles with this one, give our nbn tech team a call on 1800 834 273 and we will help configure this for you.

Please let me know how you go.

Thank you.
- Ryan

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Level 1: Cadet

Re: Home email server + dynamic DNS over Telstra NBN: can send but cannot receive

Can you please explain what is the difference between Port 25 and Port 578 with respect to functionality? Some expert suggest to turn off port during installing postfix router’s firewall, why they suggest this? I am using Telstra 4gx router.
Life aims to become an IT and Networking expert.
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Level 24: Supreme Being
Level 24: Supreme Being

Re: Home email server + dynamic DNS over Telstra NBN: can send but cannot receive

Port 25 is blocked by ISPs and port 587 is not blocked. If you have a 4GX modem do you have a business service. If you have a normal broadband service the modem will not have a public IP and your mail server will not work

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