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Oh, thank you. I didn't know that. Anyway, I'm not using a custom domain on mailbox, I use my custom mail domain with another service.
by giuliomagnifico 1y ago
Oh, thank you. I didn't know that. Anyway, I'm not using a custom domain on mailbox, I use my custom mail domain with another service.
- spapas82 1y agoUnfortunately this is common in many smtp servers and is configuration dependent: After you authenticate as usera@example.com you can send emails as userb@example.com.