In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless "Server requires authentication" is checked.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade ksmtp | Jul 30, 2024 | Aug 10, 2021 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Aug 10, 2021 |
| Ubuntu | — | No solution exists | Jul 22, 2025 | Aug 10, 2021 |
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