[pmg-devel] [PATCH pmg-api] utils: finalize_report: fix encoding for plain-text parts

Stoiko Ivanov s.ivanov at proxmox.com
Fri Jan 23 10:40:20 CET 2026


the syntax for 8-bit encoding in the content-transfer-encoding is
'8bit' not '8-bit' - see RFC2045:
https://www.ietf.org/rfc/rfc2045.html#section-6

We did set the correct value when generating bounces in SMTP.pm (the
only other (non-comment) match for '8-?bit' in the pmg-api sources).

Noticed this while checking why listmonk[0] stumbled on some bounce
mails - it was the spam-reports in the mailbox.

Minimally tested by comparing the output of:
`pmgqm send --receiver xxx at test.domain --debug1`
without and with the patch applied.

[0] application for newsletter mailing lists
    https://github.com/knadh/listmonk
Reported-by: Christian Ebner <c.ebner at proxmox.com>
Signed-off-by: Stoiko Ivanov <s.ivanov at proxmox.com>
---
 src/PMG/Utils.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/PMG/Utils.pm b/src/PMG/Utils.pm
index 52b98c01..b9c645eb 100644
--- a/src/PMG/Utils.pm
+++ b/src/PMG/Utils.pm
@@ -1374,7 +1374,7 @@ sub finalize_report {
         $top->attach(
             Data => $plaintext,
             Type => 'text/plain; charset=utf-8',
-            Encoding => '8-bit',
+            Encoding => '8bit',
         );
     }
     if ($html) {
-- 
2.47.3





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