Sendmail+Cyrus IMAP "Data format error" and bounces

[Andrea Venturoli]

On 2020-03-17 23:38, Deborah Pickett wrote:
> On 2020-03-17 23:49, Andrea Venturoli wrote:
>> _ sendmail is SMTPUTF8-aware (this is confirmed by EHLO); however 
>> Cyrus isn't?
> 
> Could be.  This option in imapd.conf might be relevant:
> 
> rfc2047_utf8: 0
> 
> If enabled, imapd will parse any non-encoded character sequence in MIME 
> header values as UTF8. This is useful for installations that either 
> advertise the UTF8SMTP (RFC 5335) extension or receive mails with 
> improperly escaped UTF-8 byte sequences. It is recommended that this 
> option is left disabled unless there is good reason to do otherwise.

I'd be curious what damage this can do.
In any case, activating it did not solve: I'm still getting "Data format 
error" and bounce.


Still trying the other things.

  bye & Thanks
	av.