Kindly advise if any postfix version upgrade to 3.1?
If no postfix version upgrade to 3.1, is there any issue with rebuild postfix with smtputf8_enable?
Any tips to rebuild to make support in SMTP-based content filters (Amavisd), LMTP servers (Dovecot), and down-stream SMTP servers?
No ATM. The Postfix package comes from CentOS: we will upgrade to Postfix 3 when CentOS (RHEL) releases it.
Yes! NethServer does not rebuild upstream packages!
Please refer to upstream documentation for that.
We avoid recompiling upstream packages because it is a big effort to test and maintain them.
Is SMTPUTF8 widely spread? Or is it still a niche? As you see it requires the upgrade of many components: is it worth the effort today? Could you explain why is it needed?
Thanks for quick feedback.
Nethserver mainly used for email server.
To avoid email consider as SPAM, I enable SPF, DMARC and DKIM signing.
No issue for SPF and DMARC on email test, but fail on DKIM: âwrong body hash: expectedâ for email with content-type: âmultipart/mixedâ or âmultipart/alternativeâ which sent from outlook.
Email sent by web mail client no issue with DKIM.
I tried to use DKIM canonicalization ârelaxed/simpleâ also same fail result âwrong body hash: expectedâ.
Per googling the issue related with âmime 8 bit encoding converted to mime 7 bit encodingâ as result hash body check fail, since postfix not support smtp with utf8 (smtputf8_enable).