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SMTP SMS Gateway API

The SMTP connection is the industry standard for high volume messaging.

The SMTP SMS Gateway API is popular with customers who need to send SMS text messages via email . This 'email to SMS' connection is the ideal mobile messaging solution for developers to use if there is already an email messaging system in place. It supports most of the functionality of the HTTP API version 2.3.0 including 8-bit messaging and templating.

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Also if you are working with a legacy server, this is the ideal product for you. The best way to send SMS text messages from a legacy server is with a server-generated email and the SMTP API is the best connection for this. Although you cannot use this application for two-way messaging you can make use of one of our other APIs such as the HTTP, FTP or SMPP API to receive your incoming messages. Besides the features shared by our entire range of API products, Clickatell's SMTP SMS Gateway API offers benefits above and beyond.

Advantages of using Clickatell's SMTP API:

  • It is the industry standard for hi-volume text messaging connections.
  • It is particularly useful for SMS notification alerts.
  • SMTP enables batch sending of text messages.
  • Clients can specify a message ID for their bulk SMS sending.
  • Clients can specify a maximum credit charge.

All of Clickatell's A2P mobile messaging solutions offer the following features:

  • Almost immediate SMS text messaging functionality for any site or application.
  • Clickatell's mobile messaging API's support text, Unicode, binary SMS, EMS and Flash messaging.
  • Our SMS Gateway API's support extended length messages.
  • Clickatell's mobile messaging API products come with extensive documentation and script libraries , saving you precious development time.
  • VCard and VCal converters are available at no charge for logo and ringtone conversions.
  • Our SMS Gateway API's have delivery acknowledgement features and customized sender ID options.
  • Two-way text messaging is enabled for most of our products and we can offer this feature through 819 networks in 222 countries.
  • Automatic rerouting to an alternative delivery gateway i f a message is delayed for a client specified period of time.
  • Customer-specified priority level SMS delivery queues.
  • SMS delivery delay of up to 7 days (excluding SMPP API).
  • Customers can query network coverage as well as text message status for both inbound and outbound messages (push and pull).

Take the free trial now of Clickatell's SMTP API , with 10 free message credits to send pre-populated text messages and see how easy it is to connect to our SMS Gateway.

How to connect via SMTP:
  • Sign up for an SMTP account and you will be given a username, password and api_id: keep these at hand.
  • Once you have registered and been activated you will receive 10 free credits with which to test our service.
  • Have the number you wish to send to ready in international format e.g. 448311234567.
  • Open your Email client (e.g. Microsoft Outlook). Create a new email in text (not html) format. In the address field type: sms@messaging.clickatell.com
  • Type your account and message details in the body of the email, laid out as follows
    user:xxxxx
    password:xxxxx
    api_id:xxxxx
    to: 448311234567
    text:Meet+me+at+home
  • The text of your message must be formatted so that '+' signs replace spaces between words as above.
  • Press send and your message will be delivered.

Sign up for SMTP


SMTP Resources:

SMTP Post Specification Version 2.3.5
1-2-3 Guide to SMTP
SMTP FAQ
SMTP Guides

Sign up for SMTP

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