> For the complete documentation index, see [llms.txt](https://docs.b2core.b2broker.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2core.b2broker.com/how-to-articles/manage-mailing-options.md).

# Manage mailing options

- [How to configure SMTP](https://docs.b2core.b2broker.com/how-to-articles/manage-mailing-options/how-to-configure-smtp.md): Learn how to configure SMTP in B2CORE to send client email notifications. Set up SMTP details like hostname, port, username, and password, then test and enable the connection for reliable mailing
- [How to determine why clients fail to receive email notifications](https://docs.b2core.b2broker.com/how-to-articles/manage-mailing-options/how-to-determine-why-clients-fail-to-receive-email-notifications.md): Learn how to identify why clients don’t receive email notifications by checking email logs, verifying template activation, testing email service, and reviewing SMTP server settings


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