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Whitelist the following:
Our new email: no-reply@notifications.learnamp.com . Currently used (until end of August 2022), but deprecated email address is: no-reply@learnamp.com
Starting end of August we will likely be using dynamic IP address. Our current fixed IP (valid until the end of August) is: 167.89.34.174
Learn Amp is highly secure so all emails from us can be trusted (read our security page here).