Início / server / Perguntas / 1083626
Accepted
user227963
Asked: 2021-11-16 09:16:55 +0800 CST

Adicionado dkimproxy ao OpenSMTPD ... mail loop ao enviar para meu próprio domínio

  • 772

Eu tenho uma configuração OpenSMTPD funcionando bem e adicionei dkimproxy a ela.

Tudo está funcionando bem e testador de e-mail, etc., todos relatam que tenho assinatura DKIM adequada e minha pontuação de e-mail é 10/10, etc.

O problema é ...

Se eu tentar enviar um e-mail de usuá[email protected] para outro_usuá[email protected], o servidor de e-mail entra em loop e o e-mail nunca é enviado. Eu vejo isso em maillog:

Nov 15 08:34:13 mail dkimproxy.out[38686]: DKIM signing - signed; message-id=<[email protected]>, signer=<[email protected]>, from=<[email protected]>
Nov 15 08:34:13 mail smtpd[33463]: 4dea90938ef29e98 smtp message msgid=0b62ff80 size=104666 nrcpt=1 proto=ESMTP
Nov 15 08:34:13 mail smtpd[33463]: 4dea90938ef29e98 smtp envelope evpid=0b62ff80eb408785 from=<> to=<[email protected]>                                                               
Nov 15 08:34:13 mail smtpd[33463]: 4dea9092f4274d88 mta delivery evpid=6fe8c750a74f16ac from=<> to=<[email protected]> rcpt=<-> source="200.100.240.135" relay="200.100.240.135 (mail.mydomain.com)" delay=1s result="Ok" stat="250 2.0.0 0b62ff80 Message accepted for delivery"

... e ele faz um loop assim talvez 50 vezes repetidamente - eventualmente desiste com este erro:

Nov 15 08:34:18 mail smtpd[33463]: warn: loop detected                                                                                                                                            
Nov 15 08:34:18 mail smtpd[33463]: 4dea9097226c93aa smtp failed-command command="DATA" result="500 5.4.6 Routing loop detected: Loop detected"                                                    
Nov 15 08:34:18 mail smtpd[33463]: 4dea90969c6cf495 mta delivery evpid=49514d020281ac48 from=<> to=<[email protected]> rcpt=<-> source="200.100.240.135" relay="200.100.240.135 (mail.mydomain.com)" delay=1s result="PermFail" stat="500 5.4.6 Routing loop detected: Loop detected"

Não faço ideia de qual seja o problema. Isso só acontece quando envio e-mail para mim mesmo ou para outro usuário com este domínio que está hospedado neste servidor de e-mail.

# cat dkimproxy_in.conf

# specify what address/port DKIMproxy should listen on
listen    200.100.240.135:10025

# specify what address/port DKIMproxy forwards mail to
relay     200.100.240.135:10026


# cat dkimproxy_out.conf 

# specify what address/port DKIMproxy should listen on
listen    200.100.240.135:10027

# specify what address/port DKIMproxy forwards mail to
relay     200.100.240.135:10028

# specify what domains DKIMproxy can sign for (comma-separated, no spaces)
domain    mydomain.com

# specify what signatures to add
signature dkim(c=relaxed)
signature domainkeys(c=nofws)

# specify location of the private key
keyfile   /root/dkim.private.key

# specify the selector (i.e. the name of the key record put in DNS)
selector  selector1

# control how many processes DKIMproxy uses
#  - more information on these options (and others) can be found by
#    running `perldoc Net::Server::PreFork'.
#min_servers 5
#min_spare_servers 2

... e isso é tudo ... obrigado.

EDIT - aqui está o opensmtpd.conf:

table aliases file:/usr/local/etc/mail/aliases

filter check_dyndns phase connect match rdns regex \
    { '.*\.dyn\..*', '.*\.dsl\..*' } \
    disconnect "550 no residential connections"

filter check_rdns phase connect match !rdns \
    disconnect "550 no rDNS"

filter check_fcrdns phase connect match !fcrdns \
    disconnect "550 no FCrDNS"

listen on 200.100.240.135 filter { check_dyndns, check_rdns, check_fcrdns }

listen on 200.100.240.135 port 10028 tag DKIM

listen on 200.100.240.135 port submission

action "local_mail" mbox alias <aliases>
action "relay_dkim" relay host smtp://200.100.240.135:10027
action "outbound" relay helo mail.mydomain.com
    
match from any mail-from "[email protected]" action "local_mail"

match tag DKIM for any action "outbound"
match for any action "relay_dkim"

match from any for domain "mydomain.com" action "local_mail"
match for local action "local_mail"

match from any auth for any action "outbound"
match for any action "outbound"
email freebsd email-server dkim opensmtpd

1 respostas

  1. Best Answer

    Esta resposta é escrita assumindo que não há motivo para usar a interface externa para processos internos. A questão não inclui a pf.confconfiguração que pode ter configurações que entram em conflito com o processamento normal de correio ao usar uma interface diferente de loopback e deve ter set skip on loou equivalente configurado.

    smtpd.conf:

    # Verify this is the correct location of aliases, which normally is
# located in /etc/mail/aliases. If you have changed aliases
# from default, be sure to run newaliases.
table aliases file:/usr/local/etc/mail/aliases

filter check_dyndns phase connect match rdns regex \
    { '.*\.dyn\..*', '.*\.dsl\..*' } \
    disconnect "550 no residential connections"

filter check_rdns phase connect match !rdns \
    disconnect "550 no rDNS"

filter check_fcrdns phase connect match !fcrdns \
    disconnect "550 no FCrDNS"

listen on 127.0.0.1 port 10028 tag DKIM
listen on 200.100.240.135 filter \
    { check_dyndns, check_rdns, check_fcrdns }
listen on 200.100.240.135 port submission

action "local_mail" mbox alias <aliases>
action "relay_dkim" relay host smtp+notls://127.0.0.1:10027
action "outbound" relay helo mail.mydomain.com

match tag DKIM for any action "outbound"
match mail-from "[email protected]" action "local_mail"
match from any for domain "mydomain.com" action "local_mail"
match from any auth for any action "outbound"
match for local action "local_mail"
match for any action "relay_dkim"

# I interpret this to be redundant:
# match for any action "outbound"

# This original configuration line seems nonsensical because
# "mail-from" is also "from any", so removed "from any"
# match from any mail-from "[email protected]" action "local_mail"

    Apesar dkimproxy_in.confde estar configurado, atualmente não há autenticação de cabeçalhos DKIM nas mensagens recebidas, pois isso não está configurado no original smtpd.conf, por isso não o adicionei.

    dkimproxy_in.conf:

    # specify what address/port DKIMproxy should listen on
listen    127.0.0.1:10025

# specify what address/port DKIMproxy forwards mail to
relay     127.0.0.1:10026

    dkimproxy_out.conf:

    # specify what address/port DKIMproxy should listen on
listen    127.0.0.1:10027

# specify what address/port DKIMproxy forwards mail to
relay     127.0.0.1:10028

# specify what domains DKIMproxy can sign for (comma-separated, no spaces)
domain    mydomain.com

# specify what signatures to add
signature dkim(c=relaxed)
signature domainkeys(c=nofws)

# specify location of the private key
keyfile   /root/dkim.private.key

# specify the selector (i.e. the name of the key record put in DNS)
selector  selector1

# control how many processes DKIMproxy uses
#  - more information on these options (and others) can be found by
#    running `perldoc Net::Server::PreFork'.
#min_servers 5
#min_spare_servers 2
    • 1

relate perguntas