![]() ![]() ![]() The complete list of countries and restrictions is given in the SMS Restrictions section below. There are many restrictions placed by network operators to filter out spam messages or to comply with local regulations. We advise following best practices for all countries. This gives more credibility to your messages and reduces the chances of getting blocked by carriers. To achieve optimal performance, get enough numeric sender IDs in international format and then rotate them randomly for each message you send.įor any marketing/promotional SMS message, we recommend adding opt-out details. Some carriers will block repeat messages from the same sender, even if they are numeric. Message 2 – Please enter 6765 into your application to verify your account.If you are sending a campaign or password code, write more than one version of the content and change it randomly. Spam filters have become very good at detecting spam attacks.Īs we’ve seen with sender IDs, it is better to randomize the body of the message – if possible. Most likely the message will not be seen by the recipient, though you must still pay for it. Not only is it illegal, it often doesn’t work. Instead, use numeric sender IDs – in international format (e.g. There are proven techniques that you can use to improve SMS delivery, as we describe below.Īvoid using alphanumeric sender IDs, since most carriers filter alphanumeric senders. The telecom industry is not fully inter-operable and the optimal path for delivery is not always the one you are using. SMS works on any handset, in any country, and it is opened more often by recipients than other channels. SMS is considered to be one of the safest channels for the transmission of critical information to a mobile phone. SMS has a mission-critical role in modern business - many high-priority applications, alerts, and content heavily depend on a timely SMS message delivery. ![]()
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