Don't Sent mail - Connect Timed Out Port 25

jorgedlcruz · Post by **jorgedlcruz** » Thu Jun 11, 2015 11:32 am

Thank you for ask,

Be sure that all of your SPF/DKIM, etc is good - https://wiki.zimbra.com/wiki/Best_Pract ... _and_DMARC

Best regards

emanuel_sd · Post by **emanuel_sd** » Thu Jun 11, 2015 4:57 pm

Hi Guys,

I changed the IP of my server, rebooted both the server and the service, but "timed out" still persists. At this point I believe the problem is not the blacklist (as it is with a new IP).

Firewall network also believe not, because other servers can connect via telnet.

I confess that I am out of ideas about it.

jorgedlcruz · Post by **jorgedlcruz** » Fri Jun 12, 2015 5:58 am

Hi emanuel,
I still thinking that the problem is not in Zimbra, so use the Linux networking troubleshooting to know more, for example: http://serverfault.com/questions/167355 ... tp-traffic
You need to use tcpdump to see what's going on and where is the 25 port stuck.
Bestr regards

emanuel_sd · Post by **emanuel_sd** » Fri Jun 12, 2015 8:32 am

Hi Guys,

I contacted my ISP to see if it could be a lock on their part. We did some tests and they proved us that there were not locks. So I went to check our edge router and found there firewall rules (not rules that would block port 25, other more general rules), after disabling the rules to deliver the mail returned to normal.

Fortunately, in fact it was not a problem in Zimbra and end my emails are being delivered.

I thank all for the support. Problem solved.

Best regards

jorgedlcruz · Post by **jorgedlcruz** » Fri Jun 12, 2015 8:51 am

A friday like this, is always good news!

Have a good day

greysnipe · Post by **greysnipe** » Thu Jun 18, 2015 1:34 am

Why is it I take 5 or more times to restart the Zimbra service in order to make the mails sent?

Jun 17 03:31:23 * postfix/error[14715]: 78A511253E0: to=<*>, relay=none, delay=29839, delays=29839/0.02/0/0.02, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to *[192.168.100.164]:25: Connection timed out)

The above message appeared multiple times. I can ping also the both sides of exchange and zimbra.

I would like to know why it took several times to restart the services before it worked successfully. When I experienced an email delay, I restart the service then requeue the messages.

nrdash · Post by **nrdash** » Sat Jun 08, 2019 2:18 pm

jorgedlcruz wrote:Hi,

Yes, I can imagine that be on 2 blacklists can cause that some Servers block you, I have the next IP for the same google fqdn, look:

ping alt1.gmail-smtp-in.l.google.com

PING alt1.gmail-smtp-in.l.google.com (64.233.165.26): 56 data bytes

Try that IP.

Best regards

Please let me know hot to change the IP to the one telnet success. I have the same problem. My server does not deliver to gmail and the after following your steps, I could find another IP for gmail and to which I receive success message when telnet.

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