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Custom SMTP

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What this integration does

Send through any SMTP server you control. The connection is verified before it is saved.

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Prerequisites

• SMTP host, port, username and password
• A from-address on a domain you control

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Step-by-step connection

1. Go to Settings → Sending and open the SMTP form.
2. Enter host, port, TLS, username, password and from-address.
3. Save — Runline authenticates before storing the credentials.

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What data syncs

Pull (into Runline)

• Nothing

Push (out of Runline)

• Approved emails sent over your SMTP connection

Two-way / notes On connect, Runline checks your domain’s SPF, DKIM and DMARC and shows a green/red status per record with a link to fix any that are missing.

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Troubleshooting

• “Could not connect” → check host/port/TLS and credentials.
• Low deliverability → fix any red SPF/DKIM/DMARC records.

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Disconnect

Settings → Sending → Disconnect sender.