From https://www.plivo.com/sms/coverage/ru/ https://www.plivo.com/sms/coverage/ru/: "Due to extensive operator-level filtering in Russia, all messages with URL

From https://www.plivo.com/sms/coverage/ru/ https://www.plivo.com/sms/coverage/ru/: "Due to extensive operator-level filtering in Russia, all messages with URLs will be subject to filtering. It is recommended that if you do not have a registered Sender ID and your messages contain URLs, then you must reach out to us to get the message content whitelisted to ensure better deliverability. "