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Recibir correos electrónicos:

tag-icon • tag-icon debian sendmail debian-stretch
Recibir correos electrónicos:

novato que intenta utilizar sendmail por primera vez. Sólo los correos electrónicos de problemas nunca llegan (ni siquiera en spam). Tengo los siguientes registros:

correo.erresta vacio

registro electrónicose muestra accepted for delivery, pero también lo recibo stat=Deferred: Connection timed out with alt4.gmail-smtp-in.l.google.comen algún momento, pero no siempre, así que no estoy seguro de si este podría ser el problema.

Ya verifiqué que el puerto 25 esté abierto connetstat -tuplen | grep 25

Registro electrónico:

Feb 17 16:57:16 mysite sendmail[1457]: w1HGvG6p001457:     [email protected], ctladdr=www-data (33/33), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30423, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (w1HGvG8t001458 Message accepted for delivery)

Feb 17 17:00:09 mysite sm-mta[689]: w1HGiDDr003604: to=.   <[email protected]>, ctladdr=<[email protected]> (33/33), delay=00:15:56, xdelay=00:10:01, mailer=esmtp, pri=120652, relay=alt4.gmail-smtp-in.l.google.com. [74.125.28.26], dsn=4.0.0, stat=Deferred: Connection timed out with alt4.gmail-smtp-in.l.google.com.


colael archivo es así:

V8
T1518886636
K0
N0
P30652
Fbs
$_localhost [127.0.0.1]
$rESMTP
$smysite.com
${daemon_flags}
${if_addr}127.0.0.1
S<[email protected]>
A<>
rRFC822; [email protected]
RPFD:<[email protected]>
H?P?Return-Path: <�g>
H??Received: from mysite.com (localhost [127.0.0.1])
    by mysite.com (8.15.2/8.15.2/Debian-8) with ESMTP id w1HGvG8t001458
    for <[email protected]>; Sat, 17 Feb 2018 16:57:16 GMT
H?x?Full-Name: www-data
H??Received: (from www-data@localhost)
    by bikecomparator.com (8.15.2/8.15.2/Submit) id w1HGvG6p001457;
    Sat, 17 Feb 2018 16:57:16 GMT
H??Date: Sat, 17 Feb 2018 16:57:16 GMT
H??Message-Id: <[email protected]>
H??To: [email protected]
H??Subject: Signup | Verification
H??X-PHP-Originating-Script: 1000:userMgmt.php
H??From:[email protected]

netstat-ntlp | grep enviar correo

tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      687/sendmail: MTA:  
tcp        0      0 127.0.0.1:587           0.0.0.0:*               LISTEN      687/sendmail: MTA:


Hospedadores 127.0.0.1 localhost mysite.com

nombre caliente mysite.com

/etc/mail/sendmail.mc

define(`_USE_ETC_MAIL_')dnl
include(`/usr/share/sendmail/cf/m4/cf.m4')dnl
VERSIONID(`$Id: sendmail.mc, v 8.15.2-8 2016-12-08 18:43:49 cowboy Exp $')
OSTYPE(`debian')dnl
DOMAIN(`debian-mta')dnl
dnl # Items controlled by /etc/mail/sendmail.conf - DO NOT TOUCH HERE
undefine(`confHOST_STATUS_DIRECTORY')dnl        #DAEMON_HOSTSTATS=
dnl # Items controlled by /etc/mail/sendmail.conf - DO NOT TOUCH HERE
dnl #
dnl # General defines
dnl #
dnl # SAFE_FILE_ENV: [undefined] If set, sendmail will do a chroot()
dnl #   into this directory before writing files.
dnl #   If *all* your user accounts are under /home then use that
dnl #   instead - it will prevent any writes outside of /home !
dnl #   define(`confSAFE_FILE_ENV',             `')dnl
dnl #
dnl # Daemon options - restrict to servicing LOCALHOST ONLY !!!
dnl # Remove `, Addr=' clauses to receive from any interface
dnl # If you want to support IPv6, switch the commented/uncommentd  lines
dnl #
FEATURE(`no_default_msa')dnl
dnl DAEMON_OPTIONS(`Family=inet6, Name=MTA-v6, Port=smtp,     Addr=::1')dnl
DAEMON_OPTIONS(`Family=inet,  Name=MTA-v4, Port=smtp,      Addr=127.0.0.1')dnl
dnl DAEMON_OPTIONS(`Family=inet6, Name=MSP-v6, Port=submission, M=Ea, Addr=::1')dnl
DAEMON_OPTIONS(`Family=inet,  Name=MSP-v4, Port=submission, M=Ea,  Addr=127.0.0.1')dnl
dnl #
dnl # Be somewhat anal in what we allow
define(`confPRIVACY_FLAGS',dnl`needmailhelo,needexpnhelo,needvrfyhelo,restrictqrun,restrictexpand,nobodyreturn,authwarnings')dnl
dnl #
dnl # Define connection throttling and window length
define(`confCONNECTION_RATE_THROTTLE', `15')dnl
define(`confCONNECTION_RATE_WINDOW_SIZE',`10m')dnl
dnl #
dnl # Features
dnl #
dnl # use /etc/mail/local-host-names
FEATURE(`use_cw_file')dnl
dnl #
dnl # The access db is the basis for most of sendmail's checking
FEATURE(`access_db', , `skip')dnl
dnl #
dnl # The greet_pause feature stops some automail bots - but check  the
dnl # provided access db for details on excluding localhosts...
FEATURE(`greet_pause', `1000')dnl 1 seconds
dnl #
dnl # Delay_checks allows sender<->recipient checking
FEATURE(`delay_checks', `friend', `n')dnl
dnl #
dnl # If we get too many bad recipients, slow things down...
define(`confBAD_RCPT_THROTTLE',`3')dnl
dnl #
dnl # Stop connections that overflow our concurrent and time connection rates
FEATURE(`conncontrol', `nodelay', `terminate')dnl
FEATURE(`ratecontrol', `nodelay', `terminate')dnl
dnl #
dnl # If you're on a dialup link, you should enable this - so    sendmail
dnl # will not bring up the link (it will queue mail for later)
dnl define(`confCON_EXPENSIVE',`True')dnl
dnl #
dnl # Dialup/LAN connection overrides
dnl #
include(`/etc/mail/m4/dialup.m4')dnl
include(`/etc/mail/m4/provider.m4')dnl
dnl #
dnl # Default Mailer setup
MAILER_DEFINITIONS
MAILER(`local')dnl
MAILER(`smtp')dnl

Respuesta1

Su ISP puede bloquear su conexión SMTP saliente (como prevención de spam saliente).

¿Recibe un mensaje de saludo SMTP cuando hace telnet al puerto SMTP de cualquier MX de gmail.com?del anfitrión? [¿Es culpa de sendmail?]

Para obtener una lista de MX de Gmail, utilice:dig MX gmail.com

Para obtener/verificar el uso del saludo SMTP:telnet gmail-smtp-in.l.google.com 25

Respuesta2

Recibir correos electrónicos:

Según su netstat -ntlp | grep sendmailresultado, su servidor solo escucha en localhost (127.0.0.1), no en su dirección IP. Si desea recibir correos electrónicos, marqueeste.

Mandando correos electrónicos:

Verificar:

  • DNS: host -t mx gmail.com. La respuesta se ve así:

    gmail.com mail is handled by 10 alt1.gmail-smtp-in.l.google.com.
gmail.com mail is handled by 20 alt2.gmail-smtp-in.l.google.com.
gmail.com mail is handled by 40 alt4.gmail-smtp-in.l.google.com.
gmail.com mail is handled by 5 gmail-smtp-in.l.google.com.
gmail.com mail is handled by 30 alt3.gmail-smtp-in.l.google.com.

  • Más DNS: host alt4.gmail-smtp-in.l.google.com(u otro servidor SMTP de Gmail). La respuesta se ve así:

    alt4.gmail-smtp-in.l.google.com has address 209.85.202.27
alt4.gmail-smtp-in.l.google.com has IPv6 address 2a00:1450:400b:c00::1a

  • Acceso al puerto SMTP: nc -vv alt4.gmail-smtp-in.l.google.com 25Debería recibir un código 220:

    220 mx.google.com ESMTP 7si2060923qty.86 - gsmtp [831 ms]

De lo contrario, tal vez su ISP esté bloqueando el puerto 25 y podría intentar usar SMTP sobre SSL (puerto 465) o envío SMTP (puerto 587).

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