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Documentation Index

Fetch the complete documentation index at: https://docs.mailglyph.com/llms.txt

Use this file to discover all available pages before exploring further.

MailGlyph includes an SMTP relay so you can send emails from apps and tools that support SMTP.
Your sender (From) domain must already be added and verified in your workspace before SMTP sends are accepted. See Verifying domains.

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SMTP credentials

Use these credentials in your SMTP client:
  • SMTP server: smtp-out.mailglyph.com
  • Username: mailglyph
  • Password: any active secret API key (sk_...)
  • Port (STARTTLS): 587
  • Port (SSL/TLS): 465

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How to set it up

1

Verify your sending domain

Add and verify the domain you will use in the From address.
2

Collect SMTP settings

Copy SMTP host, ports, username, and a secret API key from your workspace.
3

Configure your app or email client

Set SMTP auth with username mailglyph and password = your secret API key.
4

Send a test email

Send a message from a verified sender address like hello@yourdomain.com.

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SMTP behavior and limits

  • Authentication is required for every SMTP session.
  • Sender domain must belong to your workspace and be verified.
  • If you use a domain-scoped secret key, sender domains are restricted to that key’s allowlist.
  • Maximum recipients per message is 5.
  • Maximum message size is 10 MB.
  • Messages must include:
    • a valid sender
    • at least one recipient
    • a subject
    • body content (HTML or text)
Attachments are supported.

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Example (Node.js / Nodemailer)

import nodemailer from "nodemailer";

const transporter = nodemailer.createTransport({
  host: "smtp-out.mailglyph.com",
  port: 587,
  secure: false, // STARTTLS
  auth: {
    user: "mailglyph",
    pass: process.env.MAILGLYPH_SECRET_KEY,
  },
});

await transporter.sendMail({
  from: "Acme <hello@yourdomain.com>",
  to: "user@example.com",
  subject: "Test via MailGlyph SMTP",
  text: "Hello from SMTP",
});

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Example (Python / smtplib)

import smtplib
from email.mime.text import MIMEText

msg = MIMEText("Hello from SMTP")
msg["Subject"] = "Test via MailGlyph SMTP"
msg["From"] = "hello@yourdomain.com"
msg["To"] = "user@example.com"

with smtplib.SMTP("smtp-out.mailglyph.com", 587) as server:
    server.starttls()
    server.login("mailglyph", "YOUR_SECRET_API_KEY")
    server.send_message(msg)

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Example (Laravel)

Set your mailer to SMTP in .env: 
MAIL_MAILER=smtp
MAIL_HOST=smtp-out.mailglyph.com
MAIL_PORT=587
MAIL_USERNAME=mailglyph
MAIL_PASSWORD=YOUR_SECRET_API_KEY
MAIL_ENCRYPTION=tls
MAIL_FROM_ADDRESS=hello@yourdomain.com
MAIL_FROM_NAME="Acme"
Send a test email: 
use Illuminate\Support\Facades\Mail;

Route::get('/mailglyph-test', function () {
    Mail::raw('Hello from MailGlyph SMTP', function ($message) {
        $message->to('user@example.com')
            ->subject('Test via MailGlyph SMTP');
    });

    return 'Email sent';
});

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Troubleshooting

  • Invalid username: use mailglyph as username.
  • Invalid API key: use an active secret key (sk_...), not a public key.
  • Sender domain is not verified or not associated with your account: verify the sender domain in your current workspace and ensure it is allowed by the key scope.
  • TLS connection issues on port 465: use port 587 with STARTTLS.