From Newsgroup: comp.mail.sendmail

sendmail snapshot 8.18.1.15 is available for testing. This version
contains two FFRs to handle the infamous restrictions not allowing
recipients with different domains in one transaction even though
they have the same MXs.

_FFR_SAMEDOMAIN: FEATURE(`same_domain_only') enables automatic
handling of known error messages (the default messages can be
overridden by specifying arguments): if one of them is received
for a recipient then sendmail will try a new transaction afterwards
which only has recipients with the same domain.
Note: this is experimental code - please turn on the FFR,
enable the feature, observe the behaviour, and report
any problems (or successful operation).

_FFR_MF_ONEDOMAIN: mailer flag O: send only mails with recipients
which have the same domain in one transaction.


SHA256(sendmail.8.18.1.15.tar.gz)= 5dc6b67adfd04d564b4fe631d666d8237f12291f91b18efcc8b86619fd38f506
SHA256(sendmail.8.18.1.15.tar.gz.sig)= 35f2bfcc158e9cf3b2fd17dc02507ec68fb8c632476403cb70c6c8c0d4762074

Available at:
https://ftp.sendmail.org/snapshots/sendmail.8.18.1.15.tar.gz https://ftp.sendmail.org/snapshots/sendmail.8.18.1.15.tar.gz.sig
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From Newsgroup: comp.mail.sendmail

Making in /tmp/sendmail-8.18.1.15/obj.Linux.6.12.49.x86_64/sendmail
make[1]: Entering directory '/tmp/sendmail-8.18.1.15/obj.Linux.6.12.49.x86_64/sendmail'
cc -O2 -I. -I../../include -DNEWDB -DNETINET6 -DIPV6_FULL -DNEWDB -DSTARTTLS -DDANE -DSASL=2 -DTCPWRAPPERS -DNIS -DMAP_REGEX -DSOCKETMAP -DTLS_EC -DUSE_EAI -DDNSSEC_TEST -D_FFR_TLS_ALTNAMES -D_FFR_MTA_STS -DOPENSSL_NO_ENGINE -DHAVE_ERR_get_error_all -DMILTER -c -o conf.o conf.c
conf.c:4078:20: error: conflicting types for rCyhosts_ctlrCO; have rCyint(void)rCO
4078 | extern int hosts_ctl();
| ^~~~~~~~~
In file included from conf.c:4062:
/usr/include/tcpd.h:128:12: note: previous declaration of rCyhosts_ctlrCO with type rCyint(char *, char *, char *, char *)rCO
128 | extern int hosts_ctl(char *daemon, char *client_name, char *client_addr,
| ^~~~~~~~~
conf.c:4116:14: error: too many arguments to function rCyhosts_ctlrCO; expected 0, have 4
4116 | if (!hosts_ctl("sendmail", host, addr, STRING_UNKNOWN))
| ^~~~~~~~~ ~~~~~~~~~~
conf.c:4078:20: note: declared here
4078 | extern int hosts_ctl();
| ^~~~~~~~~
make[1]: *** [<builtin>: conf.o] Error 1
make[1]: Leaving directory '/tmp/sendmail-8.18.1.15/obj.Linux.6.12.49.x86_64/sendmail'
make: *** [Makefile:11: all] Error 2
# gcc -v
Reading specs from /usr/lib64/gcc/x86_64-slackware-linux/15.2.0/specs COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-slackware-linux/15.2.0/lto-wrapper Target: x86_64-slackware-linux
Configured with: ../configure --prefix=/usr --libdir=/usr/lib64 --mandir=/usr/man --infodir=/usr/info --enable-shared --enable-bootstrap --enable-languages=ada,c,c++,d,fortran,go,lto,m2,objc,obj-c++,rust,cobol --enable-threads=posix --enable-checking=release --with-system-zlib --enable-libstdcxx-dual-abi --with-default-libstdcxx-abi=new --disable-libstdcxx-pch --disable-libunwind-exceptions --enable-__cxa_atexit --disable-libssp --enable-gnu-indirect-function --enable-gnu-unique-object --enable-plugin --enable-lto --disable-install-libiberty --disable-werror --with-gnu-ld --with-isl --verbose --with-arch-directory=amd64 --disable-gtktest --enable-clocale=gnu --with-arch=x86-64 --enable-multilib --target=x86_64-slackware-linux --build=x86_64-slackware-linux --host=x86_64-slackware-linux
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.2.0 (GCC)
# head -3 /usr/doc/tcp_wrappers_7.6/README
@(#) README 1.30 97/03/21 19:27:21

This is the 7.6 version of the TCP/IP daemon wrapper package.
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From Newsgroup: comp.mail.sendmail

HQuest wrote:

-DSTARTTLS -DDANE -DSASL=2 -DTCPWRAPPERS -DNIS -DMAP_REGEX -DSOCKETMAP

conf.c:4078:20: error: conflicting types for `hosts_ctl'; have
`int(void)'

/usr/include/tcpd.h:128:12: note: previous declaration of
`hosts_ctl' with type `int(char *, char *, char *, char *)'

Do you actually use/need TCPWRAPPERS?
If so, disable the line
int hosts_ctl();
in conf.c for now until someone comes up with a better solution.
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From Newsgroup: comp.mail.sendmail

Please try this patch:

diff --git a/sendmail/conf.c b/sendmail/conf.c
index be989ae16..13118f32b 100644
--- a/sendmail/conf.c
+++ b/sendmail/conf.c
@@ -4114,7 +4114,9 @@ validate_connection(sap, hostname, e)
#if TCPWRAPPERS
char *host;
char *addr;
+# ifndef __STDC__
extern int hosts_ctl();
+# endif
#endif /* TCPWRAPPERS */

if (tTd(48, 3))

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From Newsgroup: comp.mail.sendmail

Another patch for testing (anyone using gcc 15? please give
it a try and provide feedback)

diff --git a/sendmail/conf.c b/sendmail/conf.c
@@ -4114,7 +4114,7 @@ validate_connection(sap, hostname, e)
#if TCPWRAPPERS
char *host;
char *addr;
- extern int hosts_ctl();
+ extern int hosts_ctl __P((char *, char *, char *, char *));
#endif /* TCPWRAPPERS */

if (tTd(48, 3))
--- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: comp.mail.sendmail

On Tue, 18 Nov 2025 13:13:41 -0500 (EST), Claus iso-8859 wrote:

Another patch for testing (anyone using gcc 15? please give
it a try and provide feedback)

diff --git a/sendmail/conf.c b/sendmail/conf.c
@@ -4114,7 +4114,7 @@ validate_connection(sap, hostname, e)
#if TCPWRAPPERS
char *host;
char *addr;
- extern int hosts_ctl();
+ extern int hosts_ctl __P((char *, char *, char *, char *));
#endif /* TCPWRAPPERS */

if (tTd(48, 3))

I do use gcc 15.2. The patch above seems to make the compiler going and produces an initially good binary:
# sendmail-version
Version 8.18.1.15
Compiled with: ALLOW_255 DANE HAVE_SSL_CTX_dane_enable MAX_TLSA_RR=64
DNSSEC_TEST DNSMAP IPV6_FULL LOG MAP_REGEX MATCHGECOS MILTER
MIME7TO8 MIME8TO7 NAMED_BIND NETINET NETINET6 NETUNIX NEWDB=4.8
NIS PIPELINING SASLv2 SCANF SOCKETMAP STARTTLS MTA_HAVE_TLSv1_3
TCPWRAPPERS TLS_EC TLS_VRFY_PER_CTX USERDB USE_EAI XDEBUG
OS Defines: ADDRCONFIG_IS_BROKEN 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 0x30500040
OpenSSL: linked 0x30500040

The patch, however, was applied on a different line (4078 instead of 4117) of the conf.c file. Maybe yours is already a newer snapshot?

Will keep it going for a few days to see if anything breaks. As always, Danke Claus.
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From Newsgroup: comp.mail.sendmail

HQuest wrote:

diff --git a/sendmail/conf.c b/sendmail/conf.c
- extern int hosts_ctl();
+ extern int hosts_ctl __P((char *, char *, char *, char *));

I do use gcc 15.2. The patch above seems to make the compiler going and produces an initially good binary:

Thanks, the patch has been committed.

The patch, however, was applied on a different line (4078 instead of
4117) of the conf.c file. Maybe yours is already a newer snapshot?

The patch is generated from our internal development code
which can differ from a released snapshot.
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