Postfix: fatal: unknown service: smtp/tcp

[ericdes]

I'm not sure how I got into that . I don't remember having changed much in my email server configuration. Here's what I do:

This server just tells Postfix to send emails through a relay at this address 10.0.0.3 (It's another DomU server that does all the email work, Postfix, Amavis, Spamassassin...)

So my setup for this server (at 10.0.0.1) is very simple:

Code: Select all

relayhost = [10.0.0.3]

Since yesterday I've gotten those messages, and email hasn't been delivered...

Aug 23 07:12:04 es01 postfix/smtp[6788]: smtp_parse_destination: [10.0.0.3] smtp
Aug 23 07:12:04 es01 postfix/smtp[6788]: fatal: unknown service: smtp/tcp
Aug 23 07:12:05 es01 postfix/qmgr[31041]: warning: premature end-of-input on private/smtp socket while reading input attribute name
Aug 23 07:12:05 es01 postfix/qmgr[31041]: warning: private/smtp socket: malformed response
.......
Aug 23 07:12:05 es01 postfix/master[31039]: warning: process /usr/lib/postfix/smtp pid 6788 exit status 1
Aug 23 07:12:05 es01 postfix/master[31039]: warning: /usr/lib/postfix/smtp: bad command startup -- throttling
Aug 23 07:12:05 es01 postfix/qmgr[31041]: E69FF514D8: to=<***@*****.com>, relay=none, delay=2, status=deferred (delivery temporarily suspended: unknown mail transport error)

I'm wondering why it goes through smtp, shouldn't it just pass the email to 10.0.0.3? Nothing has been configured as chrooted in master.cf, what does the private in private/smtp mean?

I'm not sure what I should do from there? Any help?

[Ijon Tichy]

Odd. That log line--

fatal: unknown service: smtp/tcp

Is usually an indication that your master.cf file is set up for chrooting the SMTP client, but the chroot environment isn't fully set up (Postfix FAQ "What does "fatal: unknown service: smtp/tcp" mean?).

Perhaps giving us a look at your master.cf file would help shed some light on things.

[ericdes]

Every line is marked with n in the chroot column. How can I check otherwise if Postfix is running chrooted?

[kashani]

what happens when you remove the square brackets around the ip address and restart your Postfix?

kashani

[ericdes]

I changed to this

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relayhost = [10.0.0.3]:25

and it worked!!!

[.:chrome:.]

check your /etc/services file
postfix can read it?

[ericdes]

/etc/services is read-write by root only. Postfix is running with username postfix.

[yottabit]

Thanks for this thread! I found that my /etc/services was set to root:root rw-/r--/---. I just gave other 'r' access and Postfix works now..

So this begs the question... how did this just start happening after years of use without changing my Postfix configuration? I did not upgrade Postfix, so it must have been a Gentoo layout or system file change?

[.:chrome:.]

/etc/services is read-write by root only. Postfix is running with username postfix.

/etc/services must to be readable from ALL users