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Settings
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 URLmailto: 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.
Host:
outlook.office365.comPort:
993 · SSL: onUsername: your full UPN
user@domain.comPassword: your M365 password (or App Password if MFA is on)
Gmail IMAP settings:
Host:
imap.gmail.comPort:
993 · SSL: onUsername:
your@gmail.comPassword: 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.