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Tutorial 03 · About 10 min

Connect a Hostinger mailbox

Send from a Hostinger mailbox: create an Agentic Mail API token in Hostinger, connect it in the Sheet and turn the mailbox on as a sender.

You need a Hostinger Email plan with a mailbox on your domain.

SheetBlast sends through Hostinger’s Agentic Mail API and checks the same Hostinger mailbox for replies, so replies don’t have to reach Gmail.

In Hostinger

  1. Go to Emails → your domain → Agentic mail → API → Create token.
Screenshot to capture
Agentic mail API page
  1. Scope: Selected mailboxes, then tick the mailbox you’ll send from.
  2. Permission: Manage all SMTP/IMAP actions.
  3. Create the token and copy it now. Hostinger shows it only once.

In the Sheet

  1. Click SheetBlast → Connect Hostinger mailbox. If Google asks for a new permission (“connect to an external service”), click Advanced → Go to SheetBlast → Allow, then click Connect Hostinger mailbox again.
  2. Paste the token and click OK. SheetBlast checks the token with Hostinger before saving it. You’ll see “Hostinger connected” with your mailbox listed.
Screenshot to capture
connected dialog
  1. Your mailbox is added to Senders as a disabled row with provider = hostinger. Tick enabled, set daily_limit to 10 to start, and fill in display_name.
  2. Run SheetBlast → 2. Check sender addresses. You should see ✓ next to your address, marked “hostinger”.

Where’s my token stored? In the script’s private settings inside your Google account. It is never written into the Sheet, the Log or error messages. To replace it, run Connect Hostinger mailbox again. To revoke it, delete the token in Hostinger.

Deliverability: check that SPF, DKIM and DMARC are set up for your domain in Hostinger (see tutorial 8).