There is one more advantage, while Proton can recognize that the two IDs are linked to the same account, other websites cannot detect that and belong to the same person. So, having a shorter email domain could help in such cases. If you have an unusually long email address, and use it as the username, there is the possibility that you may not be able to sign up for the site. Also, some websites may have character limits for the username. But they shut me off also using bots and for no reason, meaning also arbitrary, in a PAID account at $75 USD a year a couple of weeks ago.Why is this important? Simply put, a shorter name is easier to type. The shut-off described above was in a free account. Nothing more than that to be BANNED arbitrarily by these little commie pea brains who use BOTS to read your mail, shut you down for nothing, and then allege 'bulk mail'. Then, when I complained about this outrageous abuse, they accused me of sending 'BULK MAIL' and BANNED me again for 48 hours more immediately after I had sent one REPLY email to an incoming email. PROTONMAIL SHUT DOWN MY ACCOUNT AND BANNED ME on 25 September alleging 'bulk mail' for 3 incoming autoresponders that day and 3 outgoing emails the previous day. The next day, on 25 Sept 2021, I RECEIVED 3 autoresponders from another show because I had used the FORM at their own web site to send them comments on their show and links to information related to their show. On 24 Sept 2021, I sent a total of 3 emails, 2 to a bishop in Canada, 1 to a show-host about an interview he had done with a lawyer.

They now have BOTS that read your incoming and outgoing email and SHUT YOU OFF for nothing, arbitrarily banning you from using your own account, alleging 'bulk mail' when there is NO BULK MAIL happening. This is to wake you all up out there who think that Protonmail is PRIVATE.

I pay protonmail $150 USD a year for two accounts, and I have a couple of free accounts as well.

Proton email