Parallel SMTP Delivery to Carrier SMS Gateways

Send short alerts from email to phones via carrier gateways. This sender also supports up to 20 SMTPs in parallel with individual rate limits—ideal for high‑volume notifications.

How It Works

Each phone number is mapped to an email address at the recipient’s carrier. Examples (carriers may change their domains over time):

• AT&T — [email protected]
• Verizon — [email protected]
• T‑Mobile — [email protected]
• US Cellular — [email protected]
• Cricket — [email protected]

Example: [email protected], [email protected], [email protected]

Best Practices

• Keep messages under 160 characters or use MMS domains for longer content.
• Throttle per carrier to avoid filtering; set conservative per‑SMTP caps.
• Include opt‑out instructions when required by local rules.