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I am getting the following errors when postfix is trying to send mail to my email address which is hosted using google apps:

Sep 15 10:24:53 zedsaid postfix/error[17246]: 07F246D1BCA: to=<[email protected]>, relay=none, delay=356386, delays=356313/73/0/0.02, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to ASPMX5.GOOGLEMAIL.com[74.125.157.27]:25: No route to host)
Sep 15 10:24:53 zedsaid postfix/error[17249]: 0D6F46D1B30: to=<[email protected]>, relay=none, delay=370784, delays=370710/73/0/0.02, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to ASPMX5.GOOGLEMAIL.com[74.125.157.27]:25: No route to host)
Sep 15 10:24:53 zedsaid postfix/error[17255]: 0648696A004: to=<[email protected]>, relay=none, delay=140987, delays=140914/73/0/0.02, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to ASPMX5.GOOGLEMAIL.com[74.125.157.27]:25: No route to host)
Sep 15 10:24:53 zedsaid postfix/error[17259]: 0F68C6D1F5F: to=<[email protected]>, relay=none, delay=264586, delays=264512/73/0/0.02, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to ASPMX5.GOOGLEMAIL.com[74.125.157.27]:25: No route to host)
Sep 15 10:24:53 zedsaid postfix/error[17247]: 06D3796A0EB: to=<[email protected]>, relay=none, delay=167, delays=94/73/0/0.02, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to ASPMX5.G:

The DNS for my mail is correctly setup to point to google's mail servers, so why would I be getting these errors?

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3 Answers 3

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Can you telnet to ASPMX5.GOOGLEMAIL.com on port 25?

  • telnet ASPMX5.GOOGLEMAIL.com 25

If you get no route to host, you should try the IP address directly:

  • telnet 74.125.157.27 25

If this doesn't work, then you probably have an ISP that is blocking outbound connections to port 25. This is rather common these days to combat spam.

If this is the case you'll have to setup postfix to relay mail through your ISP's SMTP server. See the relayhost configuration parameter.

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3
  • Nope, I cannot connect to either of those. I did move, and got a new ISP, so this must be the issue, because I didn't change anything on my server.
    – Zed Said
    Sep 15, 2010 at 20:12
  • I have to use my ISP's SMTP? Or can I use Google Apps?
    – Zed Said
    Sep 15, 2010 at 20:13
  • @Zed: You have to use your ISP's as a relay. They are restricting your ability to connect to any SMTP server but theirs.
    – hobodave
    Sep 15, 2010 at 21:00
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I had this problem when ipv6 addresses weren't being resolved properly. I fixed it by forcing Postfix to use ipv4.

vi /etc/postfix/main.cf

Amend, or add, this line

inet_protocols = ipv4
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0

The text of your log files says "No route to host" -- this could be because your ISP is blocking outgoing smtp traffic, but is not the only reason. (For example, if your linux box has a static route that is no longer valid, you'd get something like the results you are seeing.)

Do you have lft installed on your linux box? If so, with superuser privileges, issue this command: lft aspmx5.googlemail.com:25 -- this should tell you where you are being blocked.

(lft allows you to use tcp for traceroute)

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