Mail server not working with Postfix Dovecot

Petter Adsen petter at
Mon Dec 7 18:51:26 UTC 2015

On Mon, 7 Dec 2015 15:15:24 -0300
Mariano Jara Melagrani <mjaramelagrani at> wrote:

> On 07/12/15 14:17, W Scott Lockwood III wrote:
> > On 12/7/2015 11:15 AM, Mariano Jara Melagrani wrote:  
> >> I've tried the tool on the site you suggested and I've got these
> >> results:
> >>
> >> Port 25 is closed on
> >> Port 110 is open on
> >> Port 465 is closed on
> >> Port 995 is open on  
> > Forward this to your ISP, and ask again, what ports are you not
> > blocking? Otherwise, it's a misconfiguration on your end, which is
> > possible.
> >   
> I will. Meanwhile I'll focus on those two errors that showed up in the
> logs (TLS certificate/library and DNS resolution problems).

Dec  7 14:29:25 server1 postfix/smtpd[20971]: cannot load Certificate Authority data: disabling TLS support
Dec  7 14:29:25 server1 postfix/smtpd[20971]: warning: TLS library problem: error:02001002:system library:fopen:No such file or directory:bss_file.c:169:fopen('/etc/ssl/certs/cacert.pem','r'):

This indicates that you haven't set up TLS properly. Did you generate
certificates and place them in the location above? (The location can be
configured if you put them elsewhere.) Follow the steps for setting up
saslauthd with Postfix here:

Dec  7 14:29:25 server1 postfix/smtpd[20971]: warning: hostname does not resolve to address Name or service not known
Dec  7 14:29:25 server1 postfix/smtpd[20971]: connect from unknown[]

This means that DNS lookup failed, it is just a warning and not
critical at the moment.

But both of these mean that you connected to the service. The question
is where you connected _from_ - you need to do this from outside the
ISP's network to confirm whether or not they block ports.


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