Can't send or receive emails

[fossxplorer]

Started to see this in the logs now:
 send: delivery 236: deferral: Sorry,_I_wasn't_able_to_establish_an_SMTP_connection._(#4.4.1)/

Mustafa, what's the issue as we can't send or receive emails?

[MRatWork]

Try 'telnet localhost 25' to know smtp work or not.

If not work, try 'yum reinstall *-toaster -y; sh /script/fixmail-all; sh /script/restart-mail'.

[fossxplorer]

[root@mail ~]# telnet localhost 25
Trying ::1...
Connected to localhost.
Escape character is '^]'.
220 example.com - Welcome to Qmail ESMTP
quit

Did 'yum reinstall *-toaster -y; sh /script/fixmail-all; sh /script/restart-mail' too.

But back to the same problem. My IP isn't blacklisted at any DNSBL .
The only thing i did was to run yum update a few days ago.

[MRatWork]

Usually. another issue related to wrong hostname.

[fossxplorer]

I'm checking hostname -f vs hostname -s, and -d etc all look very good.
It looks like the problem is with the Kloxo-MR/the system itself as it can't send or receive ANY emails.
Rebooting the server now since there was some kernel update as well.
Let's see.
 

[fossxplorer]

Did a reboot and checked that hostname etc are fine.
Perpahs Qmail was updated in latest Kloxo-MR update?
Does it try to use port 25 maybe as many MX don't use 25 anymore?

One of the server it can't deliver emails to, i tried to telnet into it from Kloxo server, works fine:
 telnet smtp.xxxx.no 25
Connected to smtp.xxx.no.
Escape character is '^]'.
220 mail-mx1.xxx.no ESMTP Exim 4.80 Wed, 17 Jun 2015 14:41:08 +0200
^C
quit
Connection closed by foreign host.

[fossxplorer]

The problem seems to limited to *sending* email out from Kloxo-MR.
I can receive email from Gmail etc.

[fossxplorer]

Why do i see mail spamdyke[5927]: DENIED_GRAYLISTED from:mymail@yahoo.com now?

That's my yahoo email address, but graylisted by spamdyke?

[MRatWork]

That mean your email address no pass to yahoo perfectly.

[fossxplorer]

ok, i removed that entry from spamdyke graylisting. Now ican receive Yahoo emails too.

@Mustafa, should i downgrade qmail-toaster to see if it helps?

Now i got
[root@mail ~]# yum list installed|grep qmail
qmail-pop3d-toaster.x86_64         1.03-1.3.55.mr.el6       @mratwork-release-version-arch
qmail-toaster.x86_64               1.03-1.3.55.mr.el6       @mratwork-release-version-arch
[root@mail ~]#

[MRatWork]

No reason to downgrade for qmail.

[fossxplorer]

Ok.
It might look like it's trying to use IPV6, although i've disabled IPV6 on the server.

Where is the config for what interface Qmail binds to?

[fossxplorer]

@Mustafa, we are stuck because of this issue.
I can PM you login details, can you please take a look?

[MRatWork]

@Mustafa, we are stuck because of this issue.
I can PM you login details, can you please take a look?

OK

[MRatWork]

In latest version of qmail that change certain values.

Example, think hostname as 'server.domain.com'. In previous content of /var/qmail/control/me (also defaulthost and defaultdomain) is 'domain.com' but in latest is 'server.domain.com'.

Need changed because will be trouble with 'delegate' subdomain to other server. Let say, domain.com in VPS1 but vps2.domain.com in VPS2.

To minimize issue, add 'A record' for subdomain of hostname. Example, add 'server' for 'A record' in 'domain.com' dns.