If you know the name of the recipient’s carrier, consult alist of SMS and MMS gateway addresses.
The gateway details are important.
These are used to construct your recipient’s address in the same way you would an email address.
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What’s the Difference Between SMS and MMS?
If this isn’t the case, split your message into multiple emails before sending it.
Perhaps you reached the monthly limit on your SMS ordata plan.
Maybe you lost your phone and need to send an urgent text.
