Are you using a real user to send welcome messages?

[nathank (Nathan Kershaw)]

おそらく、この方法を使用してレールコンソール経由で実行できます（最初にバックアップを取り、静かな時間に行ってください！）：

Change staff email address from console

This guide describes how to change a staff member’s email address from the console using the Rails console. It applies to situations where an administrator needs to update an email without confirmation from the old address. Required user level: System Administrator Console access required In Discourse, for enhanced security, staff members must confirm changes to their email addresses from both the new and old email addresses. However, this creates…