That mismatch between DMARC verification domain and the domain of the "from" header is called DMARC Alignment. Any modern spam filter is going to mark unaligned messages as spam. Especially if one of the domains is completely non-routable like .onion.
And even if you sent the email and it got through with your .onion address, no one would be able to reply to you because the replying mail server can't even look up the MX record for your .onion domain.
TL;DR you can send emails from .onion addresses if you want, but no clearnet server is going to accept them.
So when you send an email, you can actually put whatever you want in the from header. I could send an email that says from "made.this.up@website.doesnotexist". The protocol doesn't care.
Do you know who does care? The email server you're sending messages to, because spammers and scammers love to try and send email with fake from addresses.
So, there's an entire verification system in place that involves looking up public keys from the website that the email claims to be from. (this is a gross over simplification. Look up SPF, DKIM, and DMARC for more info). The problem is you can't even reach .onion sites from the clearnet to do the lookups. So no email servers would be able to validate your address is legitimate and so would drop it as spam.
This has nothing to do with email as a protocol. The court order discussed in the article asked for the recovery email address of an account. No actual email data was transferred.
For most transmissions of digital information (even those here on earth) there's a concept of a "checksum". Basically at the end of every message, there's a special number, and you can do some math on the rest of the message to get that same number. If anything happened to change or damage the message in transit, the math doesn't work out and so the checksum fails.
I would assume Voyager works in a similar way so every time it receives a message it will compute the checksum and see whether it matches
All words you spell must include the central letter, adjacency doesn't matter.
The design is a bit of a visual joke combining the concept of a "spelling bee" competition with the honeycombs of literal bees.
Jetbrains Phpstorm is probably best in class, but you'll have to pay for it.
God I wish I thought about anything as much as OP thinks about America.
It's perfectly normal for your computer to have daemons.
You should definitely set up a DMARC record to prevent other people from using your email domain to send spam. If you don't have DMARC configured, other email servers will give any senders the benefit of the doubt and accept mail that claims to be from your domain.
You can just set the DMARC record to reject 100% of unverified mail and call it a day. Since you aren't sending anything it won't affect you.
The ideal solution is to have one identity provider and then use Single Sign-On (SSO) to authenticate your users to all of their other apps. All of the big identity providers (Microsoft, Google, Okta, etc) support security keys.
I recognize that it might not be feasible to use SSO for all of your apps as a small business; a lot of SaaS platforms unfortunately charge extra for SSO. That being said my advice would be use SSO whenever possible for your apps and include SSO availability in your decision-making process for purchasing new software.
For those apps that do not support SSO, my advice would be to either compensate employees for using their personal devices for work or give them corporate devices that are only used for work things.
According to all known laws of aviation, there is no way that Dumbo should be able to fly. Its ears are too small to get its fat little body off the ground. Dumbo, of course, flies anyway. Because Dumbo doesn't care what you think is impossible.
The term is metonym. It is when you use a characteristic or associated attribute of a thing as the name of that thing. A classic example would be "the crown" when talking about the monarch or "The Whitehouse" when talking about the president.
These ads only appear in the "promotions" section of Gmail, the section that is by definition for advertising emails. It's not great, but this is the least intrusive place to put ads.