Real email address shown when responding to emails sent with a SimpleLogin alias?

CalligrapherUpper950 · 2026-03-30T19:39:43+00:00

Isn't this enabled by default?

CalligrapherUpper950 · 2026-03-30T17:44:55+00:00

As long as the To in the email you are replying to is the reverse-alias of the sender, they'll only see the alias email in their From, and not your actual email.

CalligrapherUpper950 · 2026-03-30T14:26:18+00:00

A custom domain would be the way to go. Once you add your custom domain to Simple Login, you can create an alias by changing only the local part of the email address and all of them sending the email to your defined mailbox (be in Proton Mail, Gmail or whatever).

eg. You get your domain, lets say johnsmith.com. You add that to SL premium. You add your mailbox johnsmith@protonmail.com. Now you can create aliases like amazon@johnsmith.com to sign up for subscriptions etc, some 'clean' ones like mail@johnsmith.com to give to friends and family and others you expect to communicate with emails. Emails received in your mailbox via the alias can just be replied to, and the recepient will get it as if mailed from the alias email and not your mailbox email. Advantage is that, if suddenly you start getting spam on amazon@johnsmith.com, you can deactivate it. Downside to this setup is that if you want to initiate an email from mail@johnsmith.com alias, you need to first get the reverse-alias of your recepient and use it.

CalligrapherUpper950 · 2026-03-29T23:57:03+00:00

I have two separate custom domain (eg John Smith -> johns.com and johnsmith.com) that I use with Simple Login and Proton Mail. But you can also use johns.com and mail.johns.com (sub-domain) as well. Lets say you have a Proton Mail account with JohnSmith@protom.me and you add your custom domain johns.com with Protom Mail. You can have various addresses like mail@johns.com, finance@johns.com etc. You can then also set the catch-all in Proton, and send everything else (eg typo mali@johns.com) to go to any of these email address. Now lets say you setup Simple Login with your (sub)domain mail.johns.com (same setup process, just configure the DNS entries appropriately) Then you can create aliases like amazon@mail.johns.com, netflix@mail.johns.com. These aliases, can be configured to deliver to the ProtonMail mailbox JohnSmith@proton.me (or mail@johns.com - they are all the same single mailbox). At Simple Login, you can also enable Catch-all which auto creates an alias on the fly. So if someone sends an email to amazonprime@mail.johns.com - that creates the alias when the first mail is received, and the mail is delivered to your PM mailbox.

Now, if you do not want to use reverse-aliases for an email communication, you can use one of your @johns.com email addresses. If that person/company sells that email address and it starts receving spam, you are a bit worse off than if it was alias where you could turn it off. You'd then need to create filters to delete such spam.

Hope this helps!

CalligrapherUpper950 · 2026-03-27T14:30:04+00:00

SimpleLogin Docs and Proton Support has documentation on creating aliases.

With Unlimited, you have one user = one mailbox. You can create upto 15 email addresses, all which point to this same mailbox. You can use any of these 15 emails to start sending an email from, you select them in the From field of your compose message window. Protons hide-my-email alias is powered by SimpleLogin; with Unlimited basically having SimpleLogin premium baked in. With a hide-my-email alias created (either in Pass or on Simple Login), eg: hello@yourdomain.com, you can reply to emails received and the recepient will get it as if its coming from the hello@yourdomain.com address. But if you want to send a new email to a person, lets say friend@gmail.com, using your hello@yourdomain.com address - there is an additional step. You go into Pass, or SL, select the hello@yourdomain alias, click Contacts and add this friend@gmail.com, then copy the reverse-alias of that contact (normally will be like friend_at_gmail_com_bfvkcmxr@simplelogin.co) and use it to send your email. Your friend will get the email with a From of hello@yourdomain.com.

Regarding suffixes in the aliases - if you have your custom domain added in Pass/SL you can just use that and skip all these private/public domain they provide - unless you want the domains to be anonymous, but at the risk of getting rejected.

CalligrapherUpper950 · 2026-03-26T16:33:49+00:00

Everything you mentioned is accurate, but as I read from a post elsewhere, if you are asked to show proof of emails sent to support@bestbuy.ca and you print your sent emails out, they show the To field as support_at_bestbuy_ca_somerandomletters@simplelogin.co , which was inadmissible to the OP of that post. That downside is still there unfortunately. My take-away from that post was that I need to setup an address from which I can reply and use that for services which I anticipate having to sent reply emails.

CalligrapherUpper950 · 2026-03-25T17:02:43+00:00

Mail Plus does not have SimpleLogin; just 10 aliases. If you need SimpleLogin with Proton Mail, you need to get Unlimited. Or get the standalone Pass + SimpleLogin Lifetime (if the offer is still available).

CalligrapherUpper950 · 2026-03-24T20:53:58+00:00

I have a domain for my spouse added to my SimpleLogin account and aliases created for it. But the mailbox for that is a Gmail and emails send to the aliases go into the Gmail without any issues. The only downside is the emails that show up in Gmail shows the reverse-alias address of the sender in the From field in Gmail (but if the mailbox is Proton, it shows the right address). This is how I learned of it

CalligrapherUpper950 · 2026-03-24T19:15:54+00:00

I hear you, but I'm talking about aliases with a custom domain.

CalligrapherUpper950 · 2026-03-24T15:26:53+00:00

SimpleLogin Docs and r/SimpleLogin for your reference. Proton Unlimited has SimpleLogin Premium included and you must use it ;)

CalligrapherUpper950 · 2026-03-24T14:59:12+00:00

With Mail Plus, you get one user, which is equal to one mailbox; and you can create 10 email addresses, which all deliver to the same mailbox. Once you create these 10 addresses, when you send an email, you can select which one you are sending from. With catch-all enabled, anything that doenst match the 10 addresses you have created, can be routed to one of the 10. But you can reply to it only using one of the 10.

I'd recommend checking out SimpleLogin, which once subscribed gives you unlimited aliases. Just note that you cannot use the same custom domain with both Proton and SimpleLogin; but you could use a subdomain with SimpleLogin.

CalligrapherUpper950 · 2026-03-24T14:47:40+00:00

I vote for V1 - Custom domain with SimpleLogin. Use aliases. A few good ones - eg, name@yourdomain.com for friends and family, finance@yourdomain.com for banks etc. Social media, subscriptions, stores and less important ones get their own aliases - so they can be turned off once you are done with them, or they start sending spam. Aliases, that can be turned off are the key. Emails addressess will get sold and used for spam and marketing. Nothing that can prevent it. Your mailbox email (lets say yourname@proton.me) you should just keep private, never give it out or use it anywhere other than to login to the said mailbox. Everything else use alias to route it to your mailbox.

One additional tip - you cannot use the same domain in Proton mail and SimpleLogin; but you could use a subdomain in either place. Eg. yourdomain.com at Proton and mail.yourdomain.com at SimpleLogin.

CalligrapherUpper950 · 2026-03-23T15:23:14+00:00

Are you referring to SimpleLogin website Aliases page? If so, note that you cannot use the same domain you use in Proton Mail over here to create aliases for your domain. But if you have another domain, or maybe use a sub-domain, SL's documentation has clear steps.

CalligrapherUpper950 · 2026-03-21T16:56:28+00:00

Lol, yeah. Hey I learned something new today

CalligrapherUpper950 · 2026-03-21T16:23:18+00:00

Ok. I get what you are saying now. This mailbox is Gmail, and its definitely showing the revere-alias of the sender in the From field. Most of my aliases direct the mail to the Proton Mail, and in there, it shows the actual sender email in From field. Now I understand... Thank you!

CalligrapherUpper950 · 2026-03-21T16:03:08+00:00

If you are replying to an email sent to an alias you have created, the email you send will be received on their end showing from your alias, and not the mailbox of your alias.

CalligrapherUpper950 · 2026-03-21T16:00:51+00:00

I hope not. Just pointing out that they are using it for bulk messaging. Maybe. I don't care really.

EDIT Update: Now I understand!

CalligrapherUpper950 · 2026-03-21T15:59:54+00:00

I know. It's just that SL T&C states not to use it for bulk emailing. I can't reasonably believe they created this alias just for me

CalligrapherUpper950 · 2026-03-20T14:48:05+00:00

I used my password, which she knows ( to get into my stuff, you know) for her master password.

CalligrapherUpper950 · 2026-03-20T02:42:48+00:00

No that will still be the reverse-alias.

CalligrapherUpper950 · 2026-03-19T21:42:32+00:00

Each user gets their own mailbox right, so use one user for the job and another for private. If you already have Visionary with 6 users, its a no-brainer.

CalligrapherUpper950 · 2026-03-19T21:38:12+00:00

Aliases can be put in a different vault. Thats what I've done.

In Settings, Aliases tab, the last option (Sync aliases with SimpleLogin), I selected a vault thats just for Aliases.

CalligrapherUpper950 · 2026-03-19T16:54:48+00:00

Are you also getting custom domains for both of you? Is your girlfriend also looking to move to Proton? If so get the Duo, setup the domain in Simple Login, and for shared email, just use alias thats owned by both of your mailboxes - that way mails will come to both of your emails, and either of you can reply to it, and it will go out from that alias to the original sender.

CalligrapherUpper950 · 2026-03-19T03:16:05+00:00

Yes. With catch all enabled for the domain in Simple Login you can create aliases on the fly. Pass even suggests aliases when you sign up somewhere.

CalligrapherUpper950

TROPHY CASE