OK, I am one step further, but still quitting
[16-Sep-2020 23:02:46 +0200]: <ieck348e> Connecting to tls://localhost:587...
85 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 220 foo-bar.comfoo-bar.com ESMTP Postfix
86 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Send: EHLO foo-bar.com
87 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 250-foo-bar.com
88 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 250-PIPELINING
89 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 250-SIZE 10240000
90 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 250-VRFY
91 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 250-ETRN
92 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 250-STARTTLS
93 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 250-ENHANCEDSTATUSCODES
94 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 250-8BITMIME
95 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 250-DSN
96 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 250 SMTPUTF8
97 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Send: STARTTLS
98 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: 220 2.0.0 Ready to start TLS
99 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Send: QUIT
100 [16-Sep-2020 23:02:46 +0200]: <ieck348e> Recv: ^W^C^C^@ú^Z^LA¹<9f><94>tê<95>ßjzݺ».@K ÝúºR^B/ª