Postfix & SMTP Issues

Question

I need to setup an send-only e-mail server. Also, I have Google Apps for my domain. So, the main issue is:

Over php mail() function, I want to send from my server (not from Google due sending limits).
Also, I want to send and receive e-mails in my Google Apps gmail app.

So, after installing postfix, my postfix main.cf is this:

TLS parameters

smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key smtpd_use_tls=yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

information on enabling SSL in the smtp client.

myhostname = mail1.elusive.com.br mydomain = elusive.com.br alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = $mydomain, $myhostname, localhost.domain relayhost = mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = +

I removed Gmail’s MX records form my DNS records for testing if was it causing the issue. I think isn’t. Anyway, my DNS records are:

MX 10 mail1.elusive.com.br. TXT “v=spf1 include:_spf.google.com include:elusive.com.br ~all”

The PRT is this:

PTR 162.243.76.132 elusive.com.br 24 hrs

So, when I try to send e-mail:

root@elusive:~# echo “Teste” | mail -s Teste lucas@lucasveiga.com

Feb 21 08:17:23 elusive postfix/pickup[15561]: C5F7862D14: uid=0 from=<root> Feb 21 08:17:23 elusive postfix/cleanup[15682]: C5F7862D14: message-id=20140221131723.C5F7862D14@mail1.elusive.com.br Feb 21 08:17:23 elusive postfix/qmgr[15562]: C5F7862D14: from=root@elusive.com.br, size=438, nrcpt=1 (queue active) Feb 21 08:17:24 elusive postfix/smtp[15684]: connect to ASPMX.L.GOOGLE.com[2607:f8b0:400d:c01::1a]:25: Network is unreachable Feb 21 08:17:54 elusive postfix/smtp[15684]: connect to ASPMX.L.GOOGLE.com[173.194.76.27]:25: Connection timed out Feb 21 08:17:54 elusive postfix/smtp[15684]: connect to ALT2.ASPMX.L.GOOGLE.com[2a00:1450:4013:c01::1a]:25: Network is unreachable Feb 21 08:18:24 elusive postfix/smtp[15684]: connect to ALT1.ASPMX.L.GOOGLE.com[173.194.66.27]:25: Connection timed out Feb 21 08:18:24 elusive postfix/smtp[15684]: connect to ALT1.ASPMX.L.GOOGLE.com[2a00:1450:400c:c03::1a]:25: Network is unreachable Feb 21 08:18:24 elusive postfix/smtp[15684]: C5F7862D14: to=lucas@lucasveiga.com, relay=none, delay=60, delays=0.01/0.01/60/0, dsn=4.4.1, status=deferred (connect to ALT1.ASPMX.L.GOOGLE.com[2a00:1450:400c:c03::1a]:25: Network is unreachable)

nitin6 · Answer

By default, port 25 is disabled on all Cloud Servers for the first 40 days of a server contract due to spam issue.We have to open manually on our end.I just opened the port.It usually updates within the hour.I would recommend testing again in about 30-40 minutes

Sergio Valadão Junior · Answer

I’m getting the same issue, the cloud server doesn’t send emails to outside the domain.So I believe that it could be due this 40 days to avoid spam. But for me it’s extremely necessary to my application works… I opened a ticked… now, i’m waiting for an answer.

Drusanet · Answer

Yes indeed. i am having problem with emails which have been already send in the past…are being send again…

i have check my main.cf config file…and added the inet_protocols = ipv4. after that i have not seen the error on not being able to reach the ipv6 address. maybe this is the reason why postfix is retrying to send some of the emails…now i will observe.