Bug#926900: sslv3 alert illegal parameter

[sergio <sergio+it@outerface.net>]

Package: reportbug
Version: 7.5.2
Severity: normal

Dear Maintainer,

I'm not sure if this is a reportbug issue, may be python3-reportbug or
python3 itself. Please correct me.


I've an exim4-daemon-heavy 4.92-2 running on buster with

CIPHERS_587 = SECURE256:-CIPHER-ALL:+AES-256-GCM:+CHACHA20-POLY1305

It works fine with all clients that I have, except reportbug:

Connecting to mail:587 via SMTP...
SMTP send failure: [SSL: SSLV3_ALERT_ILLEGAL_PARAMETER] sslv3 alert
illegal parameter (_ssl.c:1056). Do you want to retry (or else save the
report and exit)? [Y|n|q|?]?


exim -d+tls -bd shows:
...
SMTP>> 220 TLS go ahead
GnuTLS<3>: ASSERT: ../../lib/buffers.c[get_last_packet]:1171
GnuTLS<3>: ASSERT:
../../../lib/ext/server_name.c[_gnutls_server_name_recv_params]:109
GnuTLS<3>: ASSERT: ../../lib/hello_ext.c[hello_ext_parse]:273
GnuTLS<3>: ASSERT: ../../lib/extv.c[_gnutls_extv_parse]:69
GnuTLS<3>: ASSERT: ../../lib/hello_ext.c[_gnutls_parse_hello_extensions]:306
GnuTLS<3>: ASSERT: ../../lib/handshake.c[read_client_hello]:698
GnuTLS<3>: ASSERT: ../../lib/handshake.c[_gnutls_recv_handshake]:1545
GnuTLS<3>: ASSERT: ../../lib/handshake.c[handshake_server]:3400
LOG: MAIN
  TLS error on connection from [IP] (gnutls_handshake): An illegal
parameter has been received.
TLS failed to start
...

-- 
sergio.