Quick answer
An outgoing SMTP entry must match the mailbox's provider, authorization and secure connection settings. Incoming mail working does not prove SMTP is correct.
Applies to
For an authorized mailbox user. Interactive Online manages settings only for mail hosted on the selected service; mail hosted elsewhere uses that provider's settings. The preserved lesson shows an earlier interface.
Steps
- Open the intended application or account and confirm its complete mailbox address and provider.
- Open Mail > Settings > Accounts > Server Settings for the account. Review its Outgoing Mail Account and the SMTP Server List, then update only the intended server's authorized settings.
Check the result
Send from the intended From address to an external account. If mail receives but will not send, inspect the selected SMTP entry and authentication.
Troubleshooting and support
If labels differ, use the Apple guide for the installed macOS release. For a certificate mismatch, verify the provider's secure hostname instead of accepting a guessed exception.
Contact support from the owning account with the domain, product/version, exact error, time/time zone and redacted evidence. Exclude credentials, session URLs, payment details and private customer records. Confirm any separate application-support scope.
Original historical tutorial
The original tutorial link and any earlier written lesson are preserved below as historical material. They show an earlier interface and may depend on an old player. Use the current written guidance above and its references when labels or capabilities differ; the old interface does not establish current hosting availability.
Related help
- Find the correct secure IMAP and SMTP settings for your mailbox
- Choose IMAP or POP for business email
Official references
Written guidance reviewed November 1, 2026. The preserved historical tutorial has not been recertified for current software.
