Kmail - Sending Emails Unable

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=E2=80=8CHi


Since updating KMail to version 6.6.1 ("25.12.1"), I can no longer send mes=
sages (this message is sent via the laposte.net website's utility). After a=
 while, I get the following message: "Email sending failed. Message transpo=
rt failed. The remote host closed the connection. Emails are sent via SMTP =
to the mail server." The problem is the same regardless of the mail server.

In the previous version of KMail, since the beginning of 2026, sent message=
s were successfully sent and received but did not appear in the Sent Items =
folder.
I don't know what to do, especially since I've looked at the logs and I don=
't see anything unusual. Is there a way to trace the issue to get a startin=
g point for a solution?


Philippe Merlin

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<div style=3D"font-family:Arial, Helvetica, sans-serif; font-size:12px; col=
or:#00000">=E2=80=8C<span style=3D"display:inline-block; font-size:12px">Hi=
</span></div>

<div style=3D"font-family:Arial, Helvetica, sans-serif; font-size:12px; col=
or:#00000">
<div><span style=3D"display:inline-block; font-size:12px">Since updating KM=
ail to version 6.6.1 ("25.12.1"), I can no longer send messages (this messa=
ge is sent via the laposte.net website's utility). After a while, I get the=
 following message: "Email sending failed. Message transport failed. The re=
mote host closed the connection. Emails are sent via SMTP to the mail serve=
r." The problem is the same regardless of the mail server.</span></div>

<div><span style=3D"display:inline-block; font-size:12px">In the previous v=
ersion of KMail, since the beginning of 2026, sent messages were successful=
ly sent and received but did not appear in the Sent Items folder.<br>
I don't know what to do, especially since I've looked at the logs and I don=
't see anything unusual. Is there a way to trace the issue to get a startin=
g point for a solution?</span></div>
</div>

<div><span style=3D"display:inline-block; font-size:12px">Philippe Merlin</=
span></div>

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