Hello,

I'm having an issue with a simple sendmail setup, emails aliases on the form

user: remoteuser@[a.b.c.d]

are not sending the email directly to [a.b.c.d], but are always using the smart host defined in sendmail.mc

I have a mailertable with just one domain, directing all emails to our old server, that them process them directly or forwards them to other hosts.

localdomain.com relay:[192.168.254.121]

This is working fine.
And them a virtualusertable with the usernames I want to process locally;

user@domain.com localuser

The ideia behind this was to move all users from the old server to the new one, starting with the most used ones... as this is an older server not everything is well documented and we would like to keep things working...
With local delivery to local users, it's working fine. But forwarding to other servers, I have the same issues as using the local /etc/aliases file, it always use the smarthost.

Anybody has an ideia why is this happening ? What do I need to change so I can redirect emails directly to other hosts, bypassing the smarthost ?

This is on RHEL8, using sendmail 8.15

My redacted sendmail.mc is the following :

[root@mail02 mail]# egrep -v "^dnl" sendmail.mc
divert(-1)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for linux')dnl
OSTYPE(`linux')dnl
define(`confLOG_LEVEL', `19')dnl
define(`SMART_HOST', `sh.domain.com')dnl
define(`confDEF_USER_ID', ``8:12'')dnl
define(`confTO_CONNECT', `1m')dnl
define(`confTRY_NULL_MX_LIST', `True')dnl
define(`confDONT_PROBE_INTERFACES', `True')dnl
define(`PROCMAIL_MAILER_PATH', `/usr/bin/procmail')dnl
define(`ALIAS_FILE', `/etc/aliases')dnl
define(`STATUS_FILE', `/var/log/mail/statistics')dnl
define(`UUCP_MAILER_MAX', `2000000')dnl
define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl
define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl define(`confAUTH_OPTIONS', `A')dnl
define(`confAUTH_REALM', `mail')dnl
define(`confCACERT_PATH', `/etc/mail/certs')dnl
define(`confCACERT', `/etc/mail/certs/CA.pem')dnl
define(`confTLS_SRV_OPTIONS', `V')dnl
define(`confTO_IDENT', `0')dnl
FEATURE(`no_default_msa', `dnl')dnl
FEATURE(`smrsh', `/usr/sbin/smrsh')dnl
FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl VIRTUSER_DOMAIN(`localdomain.com')dnl
FEATURE(redirect)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
define(`LUSER_RELAY',`local:bouncedemail')
FEATURE(local_procmail, `', `procmail -t -Y -a $h -d $u')dnl FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl FEATURE(`blacklist_recipients')dnl
EXPOSED_USER(`root')dnl
FEATURE(`accept_unresolvable_domains')dnl LOCAL_DOMAIN(`localhost.localdomain')dnl
MASQUERADE_AS(`localdomain.com')dnl
FEATURE(masquerade_envelope)dnl
FEATURE(masquerade_entire_domain)dnl
MAILER(smtp)dnl
MAILER(procmail)dnl

Access file is

Connect:localhost.localdomain RELAY
Connect:localhost RELAY
Connect:127.0.0.1 RELAY
Connect:192.168.1.121 RELAY
Connect:172 RELAY
Connect:10.235 RELAY
Connect:10.236 RELAY
Connect:10.237 RELAY
Connect:localdomain.com RELAY
10.235.200.184 RELAY

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

Francisco Amaro <famaro@gmail.com> wrote:

Hello,

I'm having an issue with a simple sendmail setup, emails aliases on the form

user: remoteuser@[a.b.c.d]

are not sending the email directly to [a.b.c.d], but are always using the smart host defined in sendmail.mc

I have a mailertable with just one domain, directing all emails to our old server, that them process them directly or forwards them to other hosts.

localdomain.com relay:[192.168.254.121]

This is working fine.
And them a virtualusertable with the usernames I want to process locally;

user@domain.com localuser

The ideia behind this was to move all users from the old server to the
new one, starting with the most used ones... as this is an older
server not everything is well documented and we would like to keep
things working...
With local delivery to local users, it's working fine. But forwarding
to other servers, I have the same issues as using the local
/etc/aliases file, it always use the smarthost.

Anybody has an ideia why is this happening ? What do I need to change so I can redirect emails directly to other hosts, bypassing the smarthost ?

This is on RHEL8, using sendmail 8.15

My redacted sendmail.mc is the following :

[root@mail02 mail]# egrep -v "^dnl" sendmail.mc
divert(-1)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for linux')dnl
OSTYPE(`linux')dnl
define(`confLOG_LEVEL', `19')dnl
define(`SMART_HOST', `sh.domain.com')dnl
define(`confDEF_USER_ID', ``8:12'')dnl
define(`confTO_CONNECT', `1m')dnl
define(`confTRY_NULL_MX_LIST', `True')dnl
define(`confDONT_PROBE_INTERFACES', `True')dnl
define(`PROCMAIL_MAILER_PATH', `/usr/bin/procmail')dnl
define(`ALIAS_FILE', `/etc/aliases')dnl
define(`STATUS_FILE', `/var/log/mail/statistics')dnl define(`UUCP_MAILER_MAX', `2000000')dnl
define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl define(`confAUTH_OPTIONS', `A')dnl
define(`confAUTH_REALM', `mail')dnl
define(`confCACERT_PATH', `/etc/mail/certs')dnl
define(`confCACERT', `/etc/mail/certs/CA.pem')dnl define(`confTLS_SRV_OPTIONS', `V')dnl
define(`confTO_IDENT', `0')dnl
FEATURE(`no_default_msa', `dnl')dnl
FEATURE(`smrsh', `/usr/sbin/smrsh')dnl
FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl VIRTUSER_DOMAIN(`localdomain.com')dnl
FEATURE(redirect)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
define(`LUSER_RELAY',`local:bouncedemail')
FEATURE(local_procmail, `', `procmail -t -Y -a $h -d $u')dnl FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl FEATURE(`blacklist_recipients')dnl
EXPOSED_USER(`root')dnl
FEATURE(`accept_unresolvable_domains')dnl LOCAL_DOMAIN(`localhost.localdomain')dnl
MASQUERADE_AS(`localdomain.com')dnl
FEATURE(masquerade_envelope)dnl
FEATURE(masquerade_entire_domain)dnl
MAILER(smtp)dnl
MAILER(procmail)dnl

Access file is

Connect:localhost.localdomain RELAY
Connect:localhost RELAY
Connect:127.0.0.1 RELAY
Connect:192.168.1.121 RELAY
Connect:172 RELAY
Connect:10.235 RELAY
Connect:10.236 RELAY
Connect:10.237 RELAY
Connect:localdomain.com RELAY
10.235.200.184 RELAY

1, You can use mailertable to exclude some non local destination from
relaying via smart host. It seems that mailertable is not consulted for
"ip domains" ([a.b.c.d]

2. My classic suggestion is to use organization domain name
(example.com) and per host domain names (oldhost.example.com, newhost.example.com).
On oldhost use mailertable to exclude newhost.example.com from smart
host routing. It should make aliases and virtusertable work with
"per host" (sub) domain names.

In case of problem use the following email routing test commands.
Each further stage stage adds extra dignostics

sendmail -bv JohnDone@some.domain
# test map lookupss including mailertable lookups
sendmail -d60.5 JohnDone@some.domain
# test also rewriting rules (no aliases)
echo '3,0 JohnDone@some.domain" | sendmail -bt -d60.5 -d21.12


--
[Andrew] Andrzej A. Filip

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

Hello Andrzej

Thank you for your help, but subdomains are not a solution here, not all hosts are on the same top level domain, we don't want to change the configuration on the oldhost, etc.

I've tried some more of the test commands, one think I noted is that virtualusertable is checked early on the process, so I've tried to do the redirect directly, but no change, it still goes via the smarthost.
I've also deployed a new clean install (without a smarthost defined) and the aliases work as expected, so it is definitely something in my config that's causing this...

I'll keep testing stuff...


A terça-feira, 12 de abril de 2022 à(s) 15:57:12 UTC+1, Andrzej Adam Filip escreveu:

Francisco Amaro <fam...@gmail.com> wrote:

Hello,

I'm having an issue with a simple sendmail setup, emails aliases on the form

user: remoteuser@[a.b.c.d]

are not sending the email directly to [a.b.c.d], but are always using the smart host defined in sendmail.mc

I have a mailertable with just one domain, directing all emails to our old server, that them process them directly or forwards them to other hosts.

localdomain.com relay:[192.168.254.121]

This is working fine.
And them a virtualusertable with the usernames I want to process locally;

us...@domain.com localuser

The ideia behind this was to move all users from the old server to the
new one, starting with the most used ones... as this is an older
server not everything is well documented and we would like to keep
things working...
With local delivery to local users, it's working fine. But forwarding
to other servers, I have the same issues as using the local
/etc/aliases file, it always use the smarthost.

Anybody has an ideia why is this happening ? What do I need to change so I can redirect emails directly to other hosts, bypassing the smarthost ?

This is on RHEL8, using sendmail 8.15

My redacted sendmail.mc is the following :

[root@mail02 mail]# egrep -v "^dnl" sendmail.mc
divert(-1)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for linux')dnl
OSTYPE(`linux')dnl
define(`confLOG_LEVEL', `19')dnl
define(`SMART_HOST', `sh.domain.com')dnl
define(`confDEF_USER_ID', ``8:12'')dnl
define(`confTO_CONNECT', `1m')dnl
define(`confTRY_NULL_MX_LIST', `True')dnl define(`confDONT_PROBE_INTERFACES', `True')dnl define(`PROCMAIL_MAILER_PATH', `/usr/bin/procmail')dnl define(`ALIAS_FILE', `/etc/aliases')dnl
define(`STATUS_FILE', `/var/log/mail/statistics')dnl define(`UUCP_MAILER_MAX', `2000000')dnl
define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl define(`confAUTH_OPTIONS', `A')dnl
define(`confAUTH_REALM', `mail')dnl
define(`confCACERT_PATH', `/etc/mail/certs')dnl
define(`confCACERT', `/etc/mail/certs/CA.pem')dnl define(`confTLS_SRV_OPTIONS', `V')dnl
define(`confTO_IDENT', `0')dnl
FEATURE(`no_default_msa', `dnl')dnl
FEATURE(`smrsh', `/usr/sbin/smrsh')dnl
FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl VIRTUSER_DOMAIN(`localdomain.com')dnl
FEATURE(redirect)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
define(`LUSER_RELAY',`local:bouncedemail')
FEATURE(local_procmail, `', `procmail -t -Y -a $h -d $u')dnl FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl FEATURE(`blacklist_recipients')dnl
EXPOSED_USER(`root')dnl
FEATURE(`accept_unresolvable_domains')dnl LOCAL_DOMAIN(`localhost.localdomain')dnl MASQUERADE_AS(`localdomain.com')dnl
FEATURE(masquerade_envelope)dnl
FEATURE(masquerade_entire_domain)dnl
MAILER(smtp)dnl
MAILER(procmail)dnl

Access file is

Connect:localhost.localdomain RELAY
Connect:localhost RELAY
Connect:127.0.0.1 RELAY
Connect:192.168.1.121 RELAY
Connect:172 RELAY
Connect:10.235 RELAY
Connect:10.236 RELAY
Connect:10.237 RELAY
Connect:localdomain.com RELAY
10.235.200.184 RELAY

1, You can use mailertable to exclude some non local destination from relaying via smart host. It seems that mailertable is not consulted for
"ip domains" ([a.b.c.d]

2. My classic suggestion is to use organization domain name
(example.com) and per host domain names (oldhost.example.com, newhost.example.com).
On oldhost use mailertable to exclude newhost.example.com from smart
host routing. It should make aliases and virtusertable work with
"per host" (sub) domain names.

In case of problem use the following email routing test commands.
Each further stage stage adds extra dignostics

sendmail -bv John...@some.domain
# test map lookupss including mailertable lookups
sendmail -d60.5 John...@some.domain
# test also rewriting rules (no aliases)
echo '3,0 John...@some.domain" | sendmail -bt -d60.5 -d21.12

--
[Andrew] Andrzej A. Filip

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