SendmailAnalyzer as is name suggest is a free Sendmail/Postfix log analyzer. It process maillog files and generate dynamic statistics in HTML and graphical output. The reports are generated in real time so that it let you know at any moment what is going on your mail servers. It use time (hour, day, month and year views) and cross-linked navigation for easy use.

Setup and Configure SSMTP and MAILUTILS to send email from system, ie: alarm notification, crontab’s message…
This tools is useful that you do not need to setup a MTA (Mail Transfer Agent) like SMTP Server, Sendmail… to deliver system’s message.

You can use dd: dd if=/dev/zero of=output.dat bs=24M count=1 or dd if=/dev/zero of=output.dat bs=1M count=24 or dd if=/dev/zero of=outputfile.out bs=1024k count=24 or use bs=1M and count=24. Many find it nicer and easier to read… On the Mac, use 24m (small m), because the Mac doesn’t like the big M. dd if=/dev/zero of=output.dat bs=24m count=1   GIT…

I was getting this crazy error when sending out an email on my iPhone.. After some research, I just realize that there is a my mistake when making adjustment of /etc/postfix/main.cf Hereby my mistake:     mynetworks = 127.0.0.0/8 113.xxx.77.xxx/32 192.168.1.0/24 Do you recognize it? Do never forget the , comma sign “,” among each…

Resources: 1) Ubuntu – Mail Filtering 2) Ubuntu – PostfixAmavisNew The recommended and easiest way to install Pyzor is with pip: root@ubuntu:~# pip install pyzor In order to upgrade your Pyzor version run: root@ubuntu:~# pip install –upgrade pyzor For me, the latest pyzor-1.0.0 seemed to not working on my environment. Ubuntu 16.04.3 Postfix 3.1.0 Dovecot 0.4.13 SpamAssassin…

Some mail clients will use a system called “Autodiscover” to figure out which settings to use for the pop/imap/smtp settings. You can set this up if you’d like, it basically requires a subdomain and a SRV record. You can add the SRV record into any domain you want to use these settings for. If you’ve…

config postfix/dovecot using tls/ssl – force encrypt Protocol Usage Plain text/encrypted session Encrypted session only POP3 Incoming mail 110 995 IMAP Incoming mail 143 993 SMTP Outgoing mail 25 465 Submission Outgoing mail 587   Disable IMAP protocol and force IMAPS Older versions of dovecot had an array in the file: /etc/dovecot/dovecot.conf If you find an…

Below is some articles that I have referred to config SPF and DKIM on my self-host mail server. 1) SPF The first article that I found: “Authenticating with SPF: -all or ~all” And more detail: “Configure SPF and DKIM With Postfix on Debian 8” Below is my work – I was setting up for a sub-domain…

The Debian version of whereami is designed to provide multiple network connectivity options for laptops or other portable devices capable of running Debian/Ubuntu Linux. Attempted installation of the whereami package on an Amazon EC2 Debian/Ubuntu Linux instance will terminate any existing connection to the instance and cause all future connection attempts to fail.

Certbot is an easy-to-use automatic client that fetches and deploys SSL/TLS certificates for your webserver. Certbot was developed by EFF and others as a client for Let’s Encrypt and was previously known as “the official Let’s Encrypt client” or “the Let’s Encrypt Python client.” Certbot will also work with any other CAs that support the…