SMTP Error with freenet mail

Hi,
there is an error setting up the freenet.de mail.
Mail Name, Password, Server and Port is correct.
IMAP is ok - SMTP mistake
Where is the mistake ?
Thanks for your help

Logfile
----------IMAP----------
connect mailcore::IMAPSession:0098F900

  • OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ AUTH=PLAIN AUTH=LOGIN] Dovecot ready.
    ssl connect mx.freenet.de 993 2
    OpenSSL version: OpenSSL 1.1.0f 25 May 2017
    connect ok
    login
    1 LOGIN “x__xxxxx@freenet.de” *********
    1 OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY PREVIEW=FUZZY PREVIEW STATUS=SIZE SAVEDATE LITERAL+ NOTIFY METADATA SPECIAL-USE QUOTA] Logged in
    2 ENABLE QRESYNC
  • ENABLED QRESYNC
    2 OK Enabled (0.001 + 0.000 secs).
    3 NAMESPACE
  • NAMESPACE ((“INBOX.” “.”)) NIL NIL
    3 OK Namespace completed (0.001 + 0.000 secs).
    login ok
    4 LIST “INBOX.” “*”
  • LIST (\HasNoChildren \UnMarked \Junk) “.” INBOX.virenverdacht
  • LIST (\HasNoChildren \UnMarked) “.” INBOX.testmail
  • LIST (\HasNoChildren \UnMarked \Junk) “.” INBOX.spamverdacht
  • LIST (\HasNoChildren \UnMarked \Sent) “.” INBOX.sent
  • LIST (\HasNoChildren \UnMarked \Drafts) “.” INBOX.drafts
  • LIST (\HasNoChildren \UnMarked) “.” INBOX.Trash
    4 OK List completed (0.040 + 0.000 + 0.039 secs).
    5 LIST “” “INBOX”
  • LIST (\HasChildren) “.” INBOX
    5 OK List completed (0.001 + 0.000 secs).

----------SMTP----------
connect mx.freenet.de 587
220 sub1.freenet.de ESMTP Exim 4.94.2 Mon, 17 Apr 2023 17:39:01 +0200
init
EHLO xxxxx_PC
501 Syntactically invalid EHLO argument(s)
HELO xxxxx_PC
501 Syntactically invalid HELO argument(s)
QUIT

SASL_PATH:

SMTP Last Response Code: 501
SMTP Last Response: Syntactically invalid HELO argument(s)

mailsmtp Last Error Code: 1
mailsmtp Last Error Explanation: MAILSMTP_ERROR_UNEXPECTED_CODE
mailsmtp Last Error Location: 2
mailsmtp Last Auth Type: 0