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Plusnet mail relay on SORBS blacklist - email going missing

Grafter
Posts: 26
Registered: ‎14-02-2019

Plusnet mail relay on SORBS blacklist - email going missing

Hi everyone,

 

I've been having some mail sending issues with some messages going missing between sender and receiver.  Investigating causes whilst setting up SPF/DMARC and looking at DKIM seems to show that avasout07.plus.net is on the SORBS spam list.

 

http://www.sorbs.net/lookup.shtml?84.93.230.235

 

This was tested using a free service at https://mxtoolbox.com/deliverability where you send it an email, and then the deliverability report comes back with possible issues.

 

It also shows up using a dedicated blacklist checker:  https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3aavasout07.plus.net 

 

What's the best way to get this to the right technical team at plusnet to follow up and get unlisted?  Or to get my email routed via a different mail relay?

 

My MUA is setup to use an MTA at home.  That MTA relays everything through relay.plus.net:587.

 

avasout07.plus.net appears to be (consistently) the server that forwards on my mail, and as it is on a spam database, it is fairly likely this is contributing to some of my emails going missing.  I've noticed this most with recipients using hotmail.

 

Cheers,

 

Mark