SMTP: does not wait for the "real" response

[Thomas]

evolution goes on with "mail from" though the "real" response to AUTH PALIN has not received
here a debug protocol

[SMTP] Connecting to server securesmtp.t-online.de:465 ...
[SMTP] received: 220-fwd86.t-online.de T-Online ESMTP receiver fmsad ready.
[SMTP] received: 220 T-Online ESMTP receiver securesmtp.t-online.de ready.
[SMTP] sending: EHLO apt.cache
[SMTP] received: 250-fwd86.t-online.de ready.
[SMTP] received: 250-SIZE 52428800
[SMTP] received: 250-8BITMIME
[SMTP] received: 250-AUTH=LOGIN PLAIN
[SMTP] received: 250-AUTH LOGIN PLAIN
[SMTP] received: 250-ENHANCEDSTATUSCODES
[SMTP] received: 250 HELP
[SMTP] sending: AUTH PLAIN ...
[SMTP] received: 235-2.5.0 Authentication successful.

// 235-2.5.0 this is not the end of the response, but evolution goes on with MAIL FROM

[SMTP] Sending with server securesmtp.t-online.de:465 ...
[SMTP] sending: MAIL FROM: ...

// and now the real 235 came in and evolution reports an error because it wants a 250

[SMTP] received: 235 2.5.0 Authentifizierung erfolgreich.

[Wolfgang (wolfgang58)]

Good Morning,
I have the same problem with Evolution 3.42.0 (by Flathub.org) and version 3.36-5.
The log file comes from version 3.36-5 from the package sources of Mint 20.2 Cinnamon.
I just installed this version and set up a t-online account.
Receiving the mails goes without problems, you can not send.
The command I used for the debug output was:
CAMEL-DEBUG = all evolution.
greeting
wolfgang