How to avoid my (Toll Free) SMS number will be blocked or my traffic will be filtered by operators ?

add STOP word to all outgoing SMSs
use HTTPS instead of HTTP urls
opt-in: If an audit is initiated by the operators, proof of opt-ins are requested. Collecting the opt-in consent with a MO is the best practice.
don't use identical content for very large bulk mailings, try to personalize the message content (eg Hi [FIRSTNAME])
don't Shorten URLs (ie bit.lys)
no Redirect URL's
no Rotating toll-free senderID's

Updated on: 07/03/2021

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