The reason your AxCrypt verification email wasn’t received is because Spam Arrest is stopping your emails.
You should have pre-approved AxCrypt as a recipient before asking for the verification email. This is how Spam Arrest works.
Spam Arrest sends automatic replies to all new senders asking them to type in a verification word in order to verify their address. AxCrypt aren’t going to do this for you, nor are any other businesses.
That’s why very few people use Spam Arrest: it bins 100% of genuine emails – unless you (or the sender) goes out of their way to pre-approve the sender’s address. It’s a snake oil product.
Remember lots of big businesses use multiple email address (“no-reply”, “sales”, “billing”, “e-invoice” etc.) and you’ve got to pre-configure their acceptance. Many of these email addresses are not monitored and nobody will read the verification email they send. Some businesses even randomise their outgoing email addresses for targeted mail campaigns.
In many jurisdictions that accept email as an official form of communication a message is deemed served (legally served) once it’s sent and it makes no difference if you, the recipient, actually received it. The law treats it as: your email account, your problem.
Here’s a video of how Spam Arrest works.