connect to gmail.com[172.217.31.101]:25: Connection timed out

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fbzimblet
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Joined: Sun Apr 17, 2016 4:15 pm

connect to gmail.com[172.217.31.101]:25: Connection timed out

Post by fbzimblet »

When ever I'm sending outside, email would stuck at mailq and timed out like below

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connect to gmail.com[172.217.31.101]:25: Connection timed out
email coming in, do not have any problem.

ZCS 8.7.11 Ubuntu 16.04.3

I'm not sure why it choose to send to 172.217.31.101

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$ host 172.217.31.101
101.31.217.172.in-addr.arpa domain name pointer kul08s08-in-f5.1e100.net.

$ host kul08s08-in-f5.1e100.net
kul08s08-in-f5.1e100.net has address 172.217.31.101
Resolving manually with host, I can telnet port 25

Code: Select all

$ host -t mx gmail.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.
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.

$ telnet gmail-smtp-in.l.google.com 25
Trying 74.125.68.27...
Connected to gmail-smtp-in.l.google.com.
Escape character is '^]'.
220 mx.google.com ESMTP 89si1651342plc.324 - gsmtp
^]
I'm not sure where to look at to be able to send out.
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