[Evolution-users] Evolution 3.56.1 NDR: SMTPSEND.BareLinefeedsAreIllegal;

[Milan Crha]

On Tue, 2025-04-29 at 03:07 +0200, Allen Hewes via evolution-users
wrote:
> mx1.motosnap.com gave this error:
> SMTPSEND.BareLinefeedsAreIllegal; message contains bare linefeeds,
> which cannot be sent via DATA and receiving system does not support
> BDAT

	Hi,
that's the first time I see any such thing. Is it that you send the
message through the Microsoft 365 account, not through an in-evolution
configured SMTP server?

Microsoft has an article explaining the problem here:
https://learn.microsoft.com/en-us/exchange/troubleshoot/antispam-and-protection/smtpsend-barelinefeedsareillegal-when-tracing-messages

I believe a change on the evolution-data-server or evolution-ews side
is needed, depending how you send the message.

> The message I got is an HTML message.

Does it happen with other messages too? Did you simply Reply to that
message and wrote your note somewhere at the top/middle/bottom of the
message? I'd like to find a way to reproduce this.

	Bye,
	Milan