That is the default for VPNs. Look at the settings for a bypass of email checking.

Thunderbird is just a client, it's not an e-mail provider. So you're wrong, they don't send this message.

There's no bypass of email checking in Mozilla's VPN software that i can find...so where is it???

See https://www.mozilla.org/en-US/products/vpn/resource-center/split-tunneling-with-mozilla-vpn/

That's a temporary fix...thanks. But it's not what I want so next month I'm going back to my old VPN...sorry Mozilla VPN can't handle my email accounts...

Hello there

Mozilla VPN seems to be a good kind of software. It blocks in various ways and are having a strong security capability. And Is user friendly to the user environment. The network is some sort of smaller then their big brothers like McCafé or other that s why the server might could be giving some blocking features for like users as you that like to use the VPN for strong internet usage.VPN Mozilla could collect some id information. Other browser functions from add ons or add ins can block the good use of that vpn Mozilla.If you decide to stay you might check these setting before using the Mozilla VPN again.yes Mozilla VPN could have some connection problems please read the manual wisely.

Greetings googlethunderbird.

If you say so...I'm still going back to my old vpn service...never had these issues before...I'll pay a tad more but it's worth it...