Works like a champ with 3.4. I was just too lazy to recompile it after
OpenSSL 3.3.

# sendmail-version
Version 8.18.1
Compiled with: ALLOW_255 DANE HAVE_SSL_CTX_dane_enable MAX_TLSA_RR=64
DNSMAP IPV6_FULL LOG MAP_REGEX MATCHGECOS MILTER
MIME7TO8
MIME8TO7 NAMED_BIND NETINET NETINET6 NETUNIX NEWDB=4.8
NIS
PIPELINING SASLv2 SCANF SOCKETMAP STARTTLS TCPWRAPPERS
TLS_EC
TLS_VRFY_PER_CTX USERDB USE_EAI XDEBUG
OS Defines: ADDRCONFIG_IS_BROKEN DNSSEC_TEST HASFCHOWN HASFCHMOD
HASGETDTABLESIZE HAS_GETHOSTBYNAME2 HASINITGROUPS
HASLSTAT
HASNICE HASRANDOM HASRRESVPORT HASSETREGID HASSETREUID
HASSETRLIMIT HASSETSID HASSETVBUF HASURANDOMDEV
HASSTRERROR
HASUNAME HASUNSETENV HASWAITPID IDENTPROTO
NEEDSGETIPNODE
REQUIRES_DIR_FSYNC SFS_VFS USE_DOUBLE_FORK
USE_SIGLONGJMP
Kernel symbols: /boot/vmlinux
Conf file: /etc/mail/submit.cf (default for MSP)
Conf file: /etc/mail/sendmail.cf (default for MTA)
Pid file: /var/run/sendmail.pid (default)
libsm Defines: SM_CONF_LONGLONG SM_CONF_MEMCHR SM_CONF_MSG SM_CONF_SEM
SM_CONF_SIGSETJMP SM_CONF_SHM SM_CONF_SSIZE_T
SM_CONF_STDBOOL_H
SM_CONF_STDDEF_H SM_CONF_SYS_CDEFS_H SM_CONF_UID_GID
DO_NOT_USE_STRCPY SM_HEAP_CHECK SM_OS=sm_os_linux
SM_VA_STD
FFR Defines: _FFR_MTA_STS _FFR_TLS_ALTNAMES _FFR_LOGASIS=1
_FFR_M_ONLY_IPV4
OpenSSL: compiled 0x30300000
OpenSSL: linked 0x30400000

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)