got this error from two different webmailers trying to send an email to support@trezor.io.

When you are using a hardware wallet your seed is your bitcoin and you need to get comfortable with wiping your hardware wallet and restoring from seed so you can prove to yourself that there is no danger to firmware updates. You really do want to be on the latest firmware whatever your choice of wallet.

this is propably nothing to worry about but I recently purchased 3 trezor devices, 2 of these had the usual tear to the box because of the strong glue, the third trezor device however the glue cleanly only was left on one side while the other side had no glue or tear marks.
I did use a knife to open these 3 as I know the glue is strong/sticky.

I'm assuming this was either lucky or just bad quality glue and nothing I need to worry about?

https://www.coingecko.com/buzz/trezor-bitcoin-hardware-wallet-review
as in this review 3rd picture has tear visible to the box, on one of my device box there was no tear at all and all of the glue stuck to one side of the box while the other side was completely free from glue signs of tear.

edit--> as far as I can tell all 3 had the holo sticker in 100% mint condition, plastic wrap, although the plastic wrap had holes in corners on one of the boxes but this is due to shipping I assume.

mostlikely it's nothing to worry about , btw when setting up a brand new trezor device it seems at first setup the device is completely wiped?

does this mean that the Trezor OS and other stuff that makes it all work is written to it the first time I plug it in to PC?

The private keys cannot be directly accessed.  That is the entire point of the device.

However, you should/must write down the seed words and keep them private and very secure.  With those 24 seed words every private key and every transaction ever done by the device can all be recovered.  So, if you take the 24 words and do the right thing with them you can generate every possible private key the device has used or will ever use.

Thank you very much

Not so much with Trezor, but with many other software wallets there are some things to know.  Standard security for most people is to copy or type the 12 word phrase into a text document and then move it to a USB drive and store it.  There is virus software out there, right this second that can specifically look for document changes that involve 11 spaces.  It is jsut easier to parse the data and look for spaces, rather than count the words. 

This is not necessary with Trezor.  This is the beauty of the Trezor.  You don't need to worry about airgap or the computer in any way.

Theoretically you can set up a Trezor on the most highly infected computer at your public library.

You copy down the words from the Trezor display to paper.  Make sure nobody sees the paper, keep it secure and safe.

Hey there, I just buyed my Trezor wallet and wanna know if i can store TaaS in it? (I didnt received it yet, coming in the next days).

A few years ago someone bought 3 Trezors using my affiliate link. I earned 5% in BTC. Back when BTC was falling down to $300. Some pocket change that was too little to actually send. And I forgot all about it.

And yesterday the good people at SatoshiLabs decided 0.05 BTC is worth sending. A very nice surprise! Thank you very much