What type of hardware are you using: VPS bought online
What YunoHost version are you running: 12.1.3.4
How are you able to access your server: The webadmin
SSH
Are you in a special context or did you perform specific tweaking on your YunoHost instance ?: No
Describe your issue
Hello,
When attempting to set up Mailjet as an SMTP relay on Oracle Cloud (Always Free tier), the following errors are shown in the ‘/var/log/mail.log’ file when setting up Mailjet in YunoHost WebUI and sending mail through RoundCube WebUI:
It happens because the package libsasl2-modules was missing on my Debian 12.12 cloud install (debian-12-genericcloud-amd64-20251006-2257.qcow2).
Please add the package libsasl2-modules as a dependency to YunoHost installer to make sure that SMTP relay works as expected.
Share relevant logs or error messages
2025-11-05T13:27:12.374461+00:00 instance-20251105-0314 postfix/smtp[86321]: Trusted TLS connection established to in-v3.mailjet.com[34.22.188.249]:465: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256
2025-11-05T13:27:12.771933+00:00 instance-20251105-0314 postfix/smtp[86321]: warning: SASL authentication failure: No worthy mechs found
2025-11-05T13:27:12.838241+00:00 instance-20251105-0314 postfix/smtp[86321]: CDAEC4A059: to=eduardomozart182@example.com, relay=in-v3.mailjet.com[34.22.188.249]:465, delay=2, delays=0.18/0.29/1.5/0, dsn=4.7.0, status=deferred (SASL authentication failed; cannot authenticate to server in-v3.mailjet.com[34.22.188.249]: no mechanism available)