Skip to main content

SMTP mail gateway test

How to test if SMTP email gateway or server is accepting or relaying your emails successfully using commandline option through telnet from Unix or Windows platforms.

telnet emailgateway.example.com smtp
220 emailgateway.example.com ESMTP Postfix
EHLO localhost
250-emailgateway.example.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250 8BITMIME
MAIL FROM: <testadmin@example1.com>
250 Ok
RCPT TO: <unknown@unknowndomain.com>
554 <unknown@unknowndomain.com>: Relay access denied
RCPT TO: <unknown@example1.com>
554 <unknown@example.com>: Relay access denied
RCPT TO: <user1@example1.com>
250 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
Subject: test
test 1 2 3
.
250 Ok: queued as 5152A39097
QUIT
221 Bye

Popular posts from this blog

TrueCrypt on macOS X Mojave 10.14

If you have updated your macOS recently to Mojave otherwise known as verison 10.14 you may not be able to install the last version of Truecrypt in order to access your old volumes encrypted with Truecrypt software. This article will guide you to get this working on your MacOS v10.14 (Mjoave) . Download the package from  https://truecrypt.ch/downloads/  or  https://www.truecrypt71a.com/downloads/ . Find downloaded package using Finder in your HDD/Users/username/Downloads folder and will look like  TrueCrypt 7.1a Mac OS X.dmg . Open file location in Finder and open or double click on  TrueCrypt 7.1a Mac OS X.dmg . This will mount Truecrypt 7.1a and will have Truecrypt 7.1a.mpkg in it. Drag the package T rueCrypt 7.1a.mpkg and drop in your Downloads folder. From Locations in Finder you can eject your TrueCrypt mount. Now go to your Downloads location, find the file  TrueCrypt 7.1a.mpkg , right click and select Show Package Contents . Find the file Contents/distribution.di

CoVid-19 Statistics and Charts

Statistics based on some specific metrics are listed below. The data is based on daily information from Worldometer and updated manually. Charts will update automatically. Please use links below to get to individual charts and feel free to bookmark this page but do not bookmark direct chart link as it may change. These charts compare statistics for countries including China, Italy, UK, US, Pakistan & India. (Does not work in Safari Mobile) Please click on links below for specific chart, more to come. Death Doubling Rate Chart showing death rate doubling in x number of days. Survival Rate This chart shows trend of patients successfully recovered vs total closed cases. Death rate comparison Comparison of deaths per cases every day showing trend comparison and days behind. Cases reported No of cases reported, how far they are behind each other and trend. Deaths reported No of deaths reported with trend comparison betwee

Running VNC Server as a Service on Ubuntu

Method 1: VNC Server as a Service on Ubuntu desktop similar to Redhat sysconfig sudo apt-get install vncserver sudo mkdir -p /etc/sysconfig sudo touch /etc/sysconfig/vncservers sudo vi /etc/sysconfig/vncservers # Add following VNC Server instances where username and arguments are defined for each session. VNCSERVERS=" 1:user1 2:user2 3:user3 " VNCSERVERARGS[1]=" -geometry 1280x992 -depth 16 " VNCSERVERARGS[2]=" -geometry 800x600 -depth 8 " VNCSERVERARGS[3]=" -geometry 980x720 " sudo vi /etc/init.d/vncserver # Add below to the service script #!/bin/bash # # chkconfig: - 91 35 # description: Starts and stops vncserver. \ # used to provide remote X administration services. # Source function library. # . /etc/init.d/functions # Source networking configuration. # . /etc/sysconfig/network # Check that networking is up. # [ ${NETWORKING} = "no" ] && exit 0 unset VNCSERVERARGS VNC