Ubuntu 16.04 new mailserver installation can receive but cannot send

Hi Everyone,

I'm new here since I've decided to host my own linux server and try to configure it myself.

So I followed a turorial on digitalocean combined with thing I have found here on howtoforce, step by step and just to be sure I checked everything again.

The problem I have is that I'm able to receive mails, but I cannot send...

Before I begin I need to say that I did all my installations with

Code:

sudo

in front of it. Perhaps this can be important to know?

The error(s) I get when executing

Code:

sudo service postfix status

are

Code:

May 05 11:34:05 mailserver01 postfix/smtpd[4657]: disconnect from unknown[80.82.65.204] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
May 05 11:34:53 mailserver01 postfix/qmgr[2906]: EA5792C0AAC: from=<[email protected]>, size=682, nrcpt=1 (queue active)
May 05 11:34:53 mailserver01 postfix/qmgr[2906]: 650172C0BF3: from=<[email protected]>, size=405, nrcpt=1 (queue active)
May 05 11:34:53 mailserver01 postfix/postdrop[4677]: fatal: /etc/postfix/dynamicmaps.cf: file open failed: Permission denied
May 05 11:34:54 mailserver01 postfix/sendmail[4675]: warning: command "/usr/sbin/postdrop -r" exited with status 1
May 05 11:34:54 mailserver01 postfix/sendmail[4675]: fatal: [email protected](1001): unable to execute /usr/sbin/postdrop -r: Success
May 05 11:34:54 mailserver01 postfix/pipe[4670]: EA5792C0AAC: to=<[email protected]>, relay=spamassassin, delay=7187, delays=7186/0.01/0/1, dsn=4.3.0, status=deferred (temporary failure. Command output: postdrop: fatal: /etc/postfix
May 05 11:35:23 mailserver01 postfix/smtp[4674]: connect to mx2.telenet-ops.be[195.130.132.9]:25: Connection timed out
May 05 11:35:53 mailserver01 postfix/smtp[4674]: connect to mx1.telenet-ops.be[195.130.132.8]:25: Connection timed out
May 05 11:35:53 mailserver01 postfix/smtp[4674]: 650172C0BF3: to=<[email protected]>, relay=none, delay=224704, delays=224644/0.01/60/0, dsn=4.4.1, status=deferred (connect to mx1.telenet-ops.be[195.130.132.8]:25: Connection timed out

My rights on the folder and subfolders are

Code:

-rw-r----- 1 root root      153 Apr 28 12:51 dynamicmaps.cf
-rw-r--r-- 1 root root     2674 May  5 09:05 main.cf
-rw-r----- 1 root root     1388 Apr 28 14:23 main.cf.orig
-rw-r----- 1 root root     6261 May  5 09:49 master.cf
-rw-r----- 1 root postfix   142 May  1 13:07 mysql-virtual-alias-maps.cf
-rw-r----- 1 root postfix   130 May  1 13:08 mysql-virtual-mailbox-domains.cf
-rw-r----- 1 root postfix   129 May  1 13:07 mysql-virtual-mailbox-maps.cf
-rw-r----- 1 root root    21233 Apr 13  2016 postfix-files
-rwxr-x--- 1 root root     9344 Apr 13  2016 postfix-script
-rwxr-x--- 1 root root    29446 Apr 13  2016 post-install
drwxr-x--- 2 root root     4096 Apr 13  2016 sasl

I really hope someone can help me with this!

Thanks in advance
Peter

 

1. Check port 25 for sending mail, whether it is opened. Use a relay instead, if it is not opened.
2. Check you postfix config in main.cf and master.cf files. I think your destination should not contain your mail domain.