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PostPosted: Fri Jan 06, 2017 11:59 am 
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Joined: Sun Aug 16, 2015 10:13 am
Posts: 16
Hmn.. im back at Home tomarrow but i didnt enable or Installed fail2ban o.o
Can you maybe try to telnet mail.crdesigns.com?


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PostPosted: Fri Jan 06, 2017 12:53 pm 
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Joined: Sun Jan 24, 2016 4:30 am
Posts: 135
Code:
$ telnet mail.crdesigns.com 587
telnet: mail.crdesigns.com: No address associated with hostname
mail.crdesigns.com: Unknown host


Code:
$ telnet crdesigns.com 587
Trying 63.230.201.250...
telnet: connect to address 63.230.201.250: Connection refused


It seems like the domain crdesigns.com has an MX at mx1.mcgelec.com

Maybe the problem isn't at the server or your Thunderbird, maybe the problem is a badly configured DNS ???

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:idea: I love my computer... all my friends live there.


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PostPosted: Fri Jan 06, 2017 5:13 pm 
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Joined: Sun Aug 16, 2015 10:13 am
Posts: 16
Sorry not .com it is crdesigns.de


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PostPosted: Fri Jan 06, 2017 5:17 pm 
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Posts: 135
That worked better :)

Code:
$ telnet mail.crdesigns.de 587
Trying 139.162.212.140...
Connected to mail.crdesigns.de.
Escape character is '^]'.
220 hostname.crdesigns.de ESMTP Postfix (Ubuntu)

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:idea: I love my computer... all my friends live there.


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PostPosted: Fri Jan 06, 2017 5:24 pm 
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Posts: 135
Here is a little tip, if you want to do some remote tests yourself, this place has a very good collection of testing tools (lots about email, dns, etc services): http://mxtoolbox.com/NetworkTools.aspx

Based on some "dig" output, I think there is something wrong with your MX records, you have two:

Code:
;; ANSWER SECTION:
crdesigns.de.      86400   IN   MX   10 mail.crdesigns.de.
crdesigns.de.      86400   IN   MX   10 crdesigns.de.


and they point to the same IP address. Just one of the above should be enough.

_________________
:idea: I love my computer... all my friends live there.


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PostPosted: Sat Jan 07, 2017 4:15 pm 
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Joined: Sun Aug 16, 2015 10:13 am
Posts: 16
I deleted the MX Record but you know it takes some time, but this is what it gives me:
http://image.prntscr.com/image/641c70a7 ... 483e27.png
can something of that be the reason for my problem?

*edit* I tried telnet from my girlfriend's wifi with my smartphone and telnet worked.
But at home, it doesn't work, I'm not sure but can it be that my router blocks it?

*edit*
facepalm... I looked at my router logs and it seems like the last firmware update (that i didn't recognize) did reset my list for "secure email server"

Haha... man omg


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PostPosted: Sat Jan 07, 2017 5:28 pm 
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Joined: Sun Jan 24, 2016 4:30 am
Posts: 135
I'm glad you solved it!

The warnings reported by tests are not serious and you may ignore them. For example the banner can be fixed by modifying the following (in main.cf):
smtpd_banner = $myhostname ESMTP

Personally, I've solved all my configuration problems by using this script, which generates all the correct configuration files, including virutal hosts.

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:idea: I love my computer... all my friends live there.


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PostPosted: Mon Mar 20, 2017 2:36 am 
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Joined: Mon Mar 20, 2017 2:21 am
Posts: 3
I think your SSL certificate has expired.


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