Frequently Asked Questions

No. Registration is free and you receive 20 SMS credits to test the service.

Yes. Use your 20 free SMS credits without any commitment. No credit card required.

No minimum quantity required. You receive 20 free test SMS after registration. When you reach 5 remaining SMS (configurable), you will automatically receive an offer to purchase more.

There are three ways to send SMS with TeamMessage:

1. Via Email: Send an email to your personal TeamMessage address (e.g., myteam@tmsg.de). The email content is automatically converted to SMS.
2. Via Dashboard: Log in to your dashboard and use the 'Send SMS' function.
3. Via API: Integrate SMS sending into your applications using our REST API.

A team list is a group of recipients (team members) who receive messages sent to a specific email address. Each team list has its own @tmsg.de address and can contain multiple recipients with different channels (SMS, Email, Voice, etc.).

Our prices apply internationally to all networks. For unusually high volume to expensive destinations, we may contact you to discuss options.

SMS is the most reliable channel for urgent notifications. Key features:

• 98% of SMS are read within 3 minutes
• Works without internet connection
• Reaches all mobile phones, including older devices
• Up to 1530 characters per message (10 SMS concatenated)

Cost: from 9 ct per SMS to German networks.

Voice messages convert your text to a phone call. The recipient's phone rings and the message is read aloud. Ideal for:

• Night-time alerts when phones are on silent
• Reaching landline phones without SMS capability
• High-priority notifications that require immediate attention

The system automatically retries if the call is not answered. Cost: from 27 ct per call.

Fax converts your message into a fax document and sends it to a fax number. Useful for:

• Reaching organizations that still rely on fax
• Sending documents to fax machines
• Legal or compliance scenarios requiring fax confirmation

Cost: from 27 ct per fax page.

Telegram integration sends your messages as push notifications via the Telegram messenger app. Benefits:

• Instant push notifications
• Rich message formatting supported
• Recipients need the Telegram app installed

Pushover is a simple push notification service for iOS, Android, and desktop. Benefits:

• Priority levels for different urgency
• Customizable notification sounds
• Recipients need the Pushover app (one-time purchase)

Yes! Each team member can have multiple channels configured. For example, you might send via Telegram first, and if that fails, automatically fall back to SMS. This is configured in the team member settings.

Signal and WhatsApp integration are currently in development and will be available soon. These messengers have stricter API requirements, but we are working on compliant solutions.

Yes, we offer several options for receiving SMS:

• sms2team: Send SMS to our gateway number +4915123710560 to reach your team
• sms2mail: Forward incoming SMS to your email address (free or with dedicated number)

Contact support for pricing on dedicated mobile numbers.

mail2team is the core feature of TeamMessage. Send an email to your team address (e.g., myteam-alerts@tmsg.de), and all team members receive the message on their configured channels.

Perfect for:

• Server monitoring alerts
• Automated notifications from any system that can send email
• Team-wide announcements

http2sms is our REST API for sending SMS directly from your applications. Features:

• Simple HTTP POST request
• JSON response with status codes
• Delivery status callbacks (webhooks)
• OpenAPI/Swagger documentation
• IP whitelist for security

View API Documentation

With sms2mail, you can receive SMS replies to your messages. When a recipient replies to your SMS, their response is forwarded to your email address.

This feature requires a dedicated mobile number, which is available as an add-on. Contact support for pricing.

mail2voice converts incoming emails to voice calls. Send an email, and the recipient receives a phone call with the message read aloud. Useful for reaching people on landlines or for high-priority alerts.

The scheduled messages feature allows you to plan SMS sends in advance. Use cases:

• Appointment reminders (e.g., 24 hours before)
• Recurring notifications
• Campaign messages at specific times

Learn more about scheduled messages

Yes, you can set a custom sender ID (alphanumeric, up to 11 characters) for your SMS. Note that some countries restrict alphanumeric sender IDs, and recipients cannot reply to alphanumeric senders.

To forward emails to SMS:

1. Create a team list (e.g., myteam-forwarder@tmsg.de)
2. Add your mobile number as a recipient
3. Set the list as 'open group' to allow external senders
4. Set up a forwarding rule in your email client to send to the team address

Go to 'Team List' in your dashboard, select the member, and disable 'Receive TeamMessages'. The member will remain in the list but won't receive notifications.

Team lists can be configured as:

• Closed group: Only authorized senders (listed in the team) can send messages. Unknown senders are rejected.
• Open group: Anyone can send messages to the team address. Useful for public contact addresses or email forwarding.

For closed groups, you can require a keyword in the email subject for authentication. This allows:

• Senders not in the team list to send if they know the keyword
• Additional security layer beyond sender address verification

Configure the keyword in your team list settings.

Yes, you can set a maximum size for emails to be converted to SMS. Emails exceeding this size will be forwarded by email only. Set to 0 to allow attachments (which are stripped for SMS).

Any email server that can send to external addresses works with TeamMessage. Requirements:

• Valid DNS reverse lookup (PTR record)
• IP address must resolve to hostname
• Valid FQDN in HELO/EHLO

This prevents spam and ensures reliable delivery.

The IP whitelist restricts API access to specific IP addresses. Supported formats:

• Single IPv4 address: 10.0.0.1
• Single IPv6 address: 2001:db8::1
• CIDR notation: 192.168.1.0/24
• Multiple addresses separated by comma, semicolon, or space

Standard accounts allow up to 60 requests per minute. Higher limits are available for enterprise customers. Contact support for custom rate limits.

SMS logs are retained for 90 days. After that, individual message content is deleted, but aggregated statistics remain available.

Yes, our API fully supports IPv6. Both the email gateway and the REST API are accessible via IPv4 and IPv6.

When you send an SMS via API, you can specify a callback URL. We will send an HTTP POST request to this URL when:

• The SMS is delivered to the recipient's phone
• The SMS delivery fails
• The SMS expires (not delivered within 48 hours)

See API documentation for callback format

To prevent mail loops, we automatically filter emails containing 'TeamMessage.de' in the subject line. Move this text to the message body instead.

For security reasons, potentially dangerous file types are automatically filtered: .exe, .scr, .bat, .cmd, .com, .pif, and similar executables. These are stripped and the admin is notified.

You will receive an offer to purchase more credits at a configurable threshold. With direct debit authorization, you can continue sending even with a negative balance. Without it, you need to wait for payment processing.

Three options:

• Option A: Set a high threshold for new offers to have plenty of lead time
• Option B: Provide direct debit authorization for automatic payment
• Option C: Switch to PROFI tariff with monthly billing based on usage

No, please wait for an offer or invoice. However, you can control when you receive it by adjusting your credit threshold settings.

We offer three tariff types:

• EASY (Prepaid): Pay as you go. Purchase credits when you need them.
• PAUSCHAL (Flatrate): Monthly package with included SMS. Overage charged separately.
• PROFI (Postpaid): Enterprise plan with monthly billing. No prepayment required.

View detailed pricing

SMS prices depend on the destination network:

• Germany: from 9 ct per SMS
• Austria/Switzerland: from 12 ct per SMS
• Other countries: varies by destination

Long messages (over 160 characters) are split into multiple SMS and charged accordingly.

Yes, all purchases include a proper invoice with VAT. Invoices are available for download in your dashboard under 'Billing'.

Prepaid credits are valid for 24 months from purchase date. After that, unused credits expire. We send a reminder email 30 days before expiration.

The http2sms API must be activated for your account. Send an email with your customer number to support@teammessage.de. Activation is free and serves as a security measure against unauthorized access.

Check the following:

1. View the SMS log in your dashboard for the delivery status
2. Verify the phone number is correct and in international format (+49...)
3. Check if you have sufficient SMS credits
4. Ensure the recipient's phone can receive SMS

If the problem persists, contact our support with the message ID from the SMS log.

Your mail server must be properly configured:

• IP address must resolve to hostname (forward DNS)
• Hostname must resolve back to IP (reverse DNS / PTR)
• Valid fully qualified domain name (FQDN) in HELO command

Contact your mail server administrator to verify these settings.

For closed groups, you must be registered in the team list with send permission. Ask your team administrator to add you or verify your permissions.

The sender is not listed in the team list, or the required authentication keyword is missing from the subject line. Add the keyword or ask to be added to the sender list.

Common causes:

• Email exceeds size limit for SMS conversion – adjust in settings
• Sender email not authorized – add it to your team's allowed senders
• Missing DNS reverse lookup (PTR record) on your mail server
• Email flagged as spam – check our spam filter settings
• Team list is deactivated – check your dashboard

Your IP address is not in the whitelist. Add your server's IP address to the team list's IP whitelist in the dashboard settings. Remember to include both IPv4 and IPv6 if applicable.

Voice calls may fail due to:

• Recipient does not answer – the system retries automatically
• Invalid phone number
• Recipient's phone is switched off
• Network congestion

Check the delivery log for the specific SIP response code. Common codes:

• 200 – Success
• 480 – Temporarily unavailable
• 486 – Busy
• 404 – Number not found

Two methods available:

Method 1: Via Email

<?php
mail(
    "team@tmsg.de",
    "Alert",
    "Server CPU over 90%"
);
?>

Method 2: Via HTTP API

<?php
$data = [
    'tm' => '100031',
    'tn' => 'team@tmsg.de',
    'ky' => 'secret',
    'tsms' => '+491701234567',
    'msg' => 'Server alert'
];

$ch = curl_init('https://teammessage.de/api/v1/sms/send/');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
?>

Set your team email address (e.g., myteam-alerts@tmsg.de) as the contact email in NAGIOS. Define notification timeperiods to control when SMS are sent. The email-to-SMS gateway handles the conversion automatically.

Yes, use the PHP mail() function to send to your team address. Example:

<?php
if ($_POST['submit']) {
    $name = htmlspecialchars($_POST['name']);
    mail(
        "myteam-alerts@tmsg.de",
        "New form submission",
        "New contact from: $name"
    );
}
?>

Make sure the sending email address is authorized in your team list settings.

Enable in php.ini: 'allow_url_include = On' and 'allow_url_fopen = On'. Note: For security reasons, using the HTTP API is recommended instead.

Common response codes:

• +1 – Success
• -10 – Account not found (check tm/tn parameters)
• -11 – SMS sending disabled for this account
• -12 – IP address not in whitelist

Full API documentation