Notes on email custody, storage and privacy — what we learned building Nisdos Mail, and what it means for your own mailboxes.https://nisdos.com/enhttps://nisdos.com/projects/mail/articles/spf-dkim-dmarc-records/https://nisdos.com/projects/mail/articles/spf-dkim-dmarc-records/SPF, DKIM and DMARC are three TXT records that prove mail from your domain is really yours. What each checks, what breaks it, and the order to add them.Tue, 28 Jul 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/google-workspace-alternative-sovereignty/https://nisdos.com/projects/mail/articles/google-workspace-alternative-sovereignty/A Google Workspace alternative makes sense only if custody and jurisdiction outrank Docs, Calendar and Meet. What you gain, and who should stay.Mon, 06 Jul 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/unlimited-addresses-own-domain/https://nisdos.com/projects/mail/articles/unlimited-addresses-own-domain/Unlimited email addresses on your own domain let you run one address per purpose. Why providers cap aliases, what changes when addresses are free, and recipes.Mon, 15 Jun 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/true-cost-of-email-hosting/https://nisdos.com/projects/mail/articles/true-cost-of-email-hosting/What email hosting really costs: what a per-mailbox price bundles, why growing archives break per-seat pricing, and how your own bucket compares.Mon, 25 May 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/email-hosting-for-developers/https://nisdos.com/projects/mail/articles/email-hosting-for-developers/Email hosting for developers as hosted mailboxes you control: unlimited addresses on your domain, mail written into your own S3, R2, WebDAV or Git storage.Mon, 04 May 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/mxroute-migadu-fastmail-alternatives/https://nisdos.com/projects/mail/articles/mxroute-migadu-fastmail-alternatives/MXroute, Migadu and Fastmail are all good hosts that store your mail on their servers. Here is what changes when you hold the bytes yourself.Mon, 13 Apr 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/email-stored-in-your-s3/https://nisdos.com/projects/mail/articles/email-stored-in-your-s3/What lands in your S3 bucket when email is stored there: how a routing service verifies, encrypts and writes each message into a bucket you own.Mon, 23 Mar 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/proton-mail-alternative/https://nisdos.com/projects/mail/articles/proton-mail-alternative/You want a Proton Mail alternative when your concern is custody: Proton cannot read your stored mail, but it still holds the ciphertext on its own servers.Mon, 02 Mar 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/who-holds-your-email-keys/https://nisdos.com/projects/mail/articles/who-holds-your-email-keys/Email custody is two questions: who holds the keys that decrypt your mail, and who holds the stored bytes. The four combinations fail in very different ways.Mon, 23 Feb 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/gdpr-email-hosting/https://nisdos.com/projects/mail/articles/gdpr-email-hosting/GDPR makes you the controller of your mailboxes and your host a processor. What that means in practice: Article 28 terms, transfers, breach duties.Mon, 02 Feb 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/email-data-residency/https://nisdos.com/projects/mail/articles/email-data-residency/Data residency is where the bytes of your mail physically rest. Jurisdiction follows whoever controls them. They are separate choices, and both are choosable.Mon, 12 Jan 2026 00:00:00 GMThttps://nisdos.com/projects/mail/articles/self-hosted-email-alternative/https://nisdos.com/projects/mail/articles/self-hosted-email-alternative/Self-hosting email buys custody and costs you deliverability work forever. The middle path keeps the custody and hands off the SMTP stack.Mon, 08 Dec 2025 00:00:00 GMThttps://nisdos.com/projects/mail/articles/cloud-act-and-your-email/https://nisdos.com/projects/mail/articles/cloud-act-and-your-email/The US CLOUD Act obliges providers under US jurisdiction to produce data they control, wherever the disks sit. What that means for email, and what changes it.Mon, 10 Nov 2025 00:00:00 GMThttps://nisdos.com/projects/mail/articles/zero-access-email/https://nisdos.com/projects/mail/articles/zero-access-email/Zero-access email means the provider encrypts arriving mail with your public key and cannot read what it stores. What it does not cover: metadata, custody.Mon, 13 Oct 2025 00:00:00 GMThttps://nisdos.com/projects/mail/articles/byos-email-explained/https://nisdos.com/projects/mail/articles/byos-email-explained/Bring-your-own-storage email routes and encrypts your mail, then writes it into cloud storage you own: your S3, R2, WebDAV or a Git repository.Mon, 15 Sep 2025 00:00:00 GMT