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SMTP Configuration


📖 Standard SMTP Quick Guide

Gmail: Host smtp.gmail.com, port 587, STARTTLS on. Requires an App Password — not your main Google password (create one here).

Outlook personal / Hotmail: smtp-mail.outlook.com, port 587, STARTTLS on.

Microsoft 365 (SMTP AUTH): smtp.office365.com, port 587, STARTTLS on. The account must have SMTP AUTH enabled in M365 admin.

Custom SMTP server: Enter your provider's host and credentials.

Sending rate: 60/hr = 1 email/minute. Start at 30–60/hr and increase gradually to avoid spam filters.

Unsubscribe links are added automatically to every outgoing email.


📝 Template Variables

Use {{first_name}}, {{last_name}}, {{email}} in any template.
Extra CSV columns are also available as variables.
Example: if your CSV has a company column, use {{company}} in your template.

📬 Unsubscribe Inbox (IMAP)

Optional — enables email-based unsubscribe that works without a public URL
How it works: When configured, every outgoing email gets a mailto: unsubscribe link instead of a localhost web link. Recipients click it → their email client sends a pre-written message to your inbox → MailBot checks that inbox every 5 minutes and automatically marks matching contacts as unsubscribed. Gmail, Apple Mail, and Outlook also show a native "Unsubscribe" button in the email header when they see the List-Unsubscribe header with a mailto: address.
Can be the same as your From Email, or a dedicated address like unsubscribe@yourdomain.com — as long as the IMAP credentials above can access that mailbox.
M365 / Outlook IMAP settings:
Host: outlook.office365.com
Port: 993  ·  SSL: on
Username: your full UPN user@domain.com
Password: your M365 password (or App Password if MFA is on)

Gmail IMAP settings:
Host: imap.gmail.com
Port: 993  ·  SSL: on
Username: your@gmail.com
Password: an App Password (not your main Google password)
Enable IMAP in Gmail → Settings → See all settings → Forwarding and POP/IMAP

Note: For M365, the account needs SMTP AUTH enabled (same requirement as sending). If basic auth is blocked by Security Defaults, IMAP won't work either — use an App Password or disable Security Defaults in Azure AD.
✉ MailBot GR