Connect Google Workspace (custom domain)

For a mailbox on your own domain hosted by Google Workspace — the best setup for outbound volume.

Workspace users can connect via OAuth too. Head to Settings → Integrations and click Connect next to Google — one click, no app password, works with any Workspace domain where your admin hasn't restricted third-party sign-ins. This guide remains the definitive fallback when OAuth is blocked by your admin.

This is what SAIDR itself uses for support@saidr.io. It's the highest-deliverability path for cold outbound if you own a business domain.

1 · Confirm 2-Step Verification is on

Go to myaccount.google.com/security → confirm 2-Step Verification is on. Turn it on if it isn't. Workspace admins can enforce this for every user in the Admin Console under Security → Authentication.

2 · Generate an app password

1
Go to myaccount.google.com/apppasswords.
2
In App name, type SAIDR and click Create.
3
Copy the 16-character password including the spaces.

“App passwords are not available for your account.” Your admin has disabled them. The easiest workaround is OAuth — head to Settings → Integrations and click Connect next to Google. If your admin has also restricted third-party OAuth, ask them to either enable app passwords for your OU or allow SAIDR as a trusted app.

3 · Paste into SAIDR

SMTP host: smtp.gmail.com
SMTP port: 587
Use TLS: on
Username: your full workspace email (you@yourcompany.com)
Password: the app password from step 2

4 · Set up SPF, DKIM, and DMARC (mandatory for deliverability)

This is the step that separates mail landing in the inbox from mail landing in spam. If you haven't done this for your domain yet, do it before sending at any real volume.

SPF: add a TXT record to your domain's DNS: v=spf1 include:_spf.google.com ~all
DKIM: in Google Admin → Apps → Gmail → Authenticate email, generate a 2048-bit key and copy the TXT record Google gives you into DNS.
DMARC: add a TXT record at _dmarc.yourdomain.com: v=DMARC1; p=quarantine; rua=mailto:postmaster@yourdomain.com

It can take up to 48 hours for DNS to propagate. Once it does, run a test at mail-tester.com — you want a score of 9/10 or higher before going live.