Update blacklisted dynamic WAN IP

[beastMode]

Our cable broadband connects through a WAN with dynamic IP address, which changes periodically. It changed last week to a Telstra IP which had already been blacklisted with Spamhaus, and now I'm unable to deliver emails to clients using Gmail accounts. Two screengrabs attached for evidence. I want to have the dynamic IP reset / updated, however despite three calls to support, including Premium, I keep getting fobbed off with 'switch your router off and on again'. Can anyone help out here, preferably within Telstra? 

[Yastiandrie]

Did you go to the spamhaus site and request delisting? You'll find its part of a PBL, which is not a blacklist block and is normal

Post the mail administrator return message

[beastMode]

Thanks Yastiandrie.

From Spamhaus' site: "How to get off this blacklist: ISPs and broadband providers can manually add and remove IPs from the PBL; normal end users would not be able to remove IPs."

Sadly I am a normal end-user

[Yastiandrie]

PBL is not a blacklist

What outgoing settings are you using? and what is the mail administrator return message saying as you should be getting these with the rejection rejection if you are being blacklist rejected?

[Jupiter]

You need to make sure that Authentication is enable on you outgoing mail server, and make sure that you are not using Port 25 for SMTP (you should be using port 465).

[beastMode]

Thanks Jupiter. Authentication and port settings are fine. In fact delivery to gmail works, however because of the blacklisting on the IP the delivery is firewalled by gmail before reaching the destination address. Recipients don't received them. See below mail report for reference. This is why I'm trying to get the dynamic IP updated. 

[Yastiandrie · Accepted solution]

If you were spamhaus, or equivalent, blacklisted the email wouldn't even go that far, you would get a mail delivery return message in your email client advising that the email failed to send due to blacklisting.

The email was accepted by google, which means it reached the destination so its not a third party blacklisting issue.

Lease times for cable IP's should be 4 hours. If you are trying to jump IP's, you would need to disconnect the coaxial cable from the wallplate (and also FOXTEL's if you have it and it is in a different wallplate, as it can keep a connection live) for a bare minimum of 2 hours. The longer it is disconnected, the better chance you will have of jumping addresses.

Alternatively you could contact google to find out why your emails are not being received by the recpient and see if they will rectify it

[beastMode]

Thanks Yastiandrie. I tried disconnecting the coax from the wallplate overnight during the weekend. Despite being separated for 8 or more hours I still have the same WAN IP. Any other ideas?

It transpires that the Gmails are being delivered, but to the spam folder. I'm assuming this is because the Telstra owned IP is still listed on Spamhaus ZEN.

[Jupiter]

Are you sending the emails from a server located within your own network?

If so, that is why Gmail is rejecting them as spam. The Telstra IP address is flagged so that only emails originating from that range of IP addresses are marked as authentic if they originate from a Telstra server.

This type of flag will not be removed by Telstra.

If you are running a business and want to host your own server, then you need a business grade account with a fixed IP address.

[beastMode]

I'm based in Brisbane QLD. Our mail server is hosted in Newcastle NSW. I access it through the Telstra WAN with Dynamic IP.

[Jupiter]

It sounds like the authentification on your mail server is not set up correctly.

It should not be reporting that your home IP address is the originator. It should be reporting to Gmail that it had authenticated the email login and that it's address is the origin.