Google Nest blocking new email servers?

[TJ_TD]

I hope someone can help me here, as I am at a complete loss! My small business email and website moved host last week. Since then I can’t access either, including webmail, on my laptop or phone.
Through a process of elimination it seems to be our Google nest that is causing an issue. We use it as a router with a Virgin Media 3.0 router on modem mode.
I can access my webmail on 4G on my phone, and on my laptop if I hotspot off my phone.
We turned the Virgin modem mode off so that was the router rather than the Nest and I could again access everything on my phone and laptop. 
As soon as Nest is back to being the router I have the ‘cannot access servers’ message again and my email account reverts to offline. 
Can anyone please help with this? Anything I can try in settings? I don’t know a huge deal about this so basic speak would be good please! Thank you in advance x

[RXShorty]

Hi @TJ_TD 

Maybe the DNS is causing issues because you moved the website?
Did you try rebooting the Nest Wifi by using Restart network within the Google Home app?

[TJ_TD]

Thank you so much for taking the time to reply! We tried everything, including a full restart. I learnt all about DNS and double NAT?! I was getting desperate! Turns out the new host had blacklisted the Nest’s IP due to too many invalid log-ins?! I have no idea… but thank goodness, it’s now working. 

[RXShorty]

Hi @TJ_TD 

Great to hear it is fixed! 😊

[Jeff]

Thanks for the help, RXShorty.

Hey TJ_TD,

It looks like RXShorty was able to help you work this out. I'm happy to see he was able to get you some answers here. I just wanted to follow up to see if you had any other questions or to see if you were all set here.

Thanks,
Jeff

[Jeff]

Hi all,

As we got our resolution here, I'm going to mark this one as resolved in the next 24 hours. Thanks to all who helped and contributed. If anyone has any other needs, please feel free to let me know before the lock.

Thanks,
Jeff

[TJ_TD]

Thank you all!

[Juni]

Hi there,

I’m glad your issue is resolved now. We will close this thread now. Feel free to reach out again should you have more questions/suggestions - we are here for you.

Cheers,

Juni