(free) postmaster tools

Topics in this area:
click.it: the link tracker with instant email feedback
share your secrets via email - enigma is a secure, one-time use, passwordless link generator
a ready-to-use mailbox that receives any message and keeps it for a limited time
a fake smtp/api service with web gui for testing emails in applications easily
an online check tool to validate SPF and DKIM settings sending an email message
Subsections of (free) postmaster tools
click.it link tracker

with instant email feedback
This page builds tracked links that will send the data:
» clickit.realsender.com
The free version is fully functional, with some limitations:
- the email messages are sent to the inxbox demo temporary mailbox and kept for seven days
- after the click, the browser will show a standard “thank you” page
- the tracking domain is “click.it”
The paid version is customized and lets you:
enigma secure email

Email is not private or secure. It wasn’t designed with privacy or security in mind.
Anyone who handles your email in transit can read it,
including your ISP, a hacker, or the NSA (U.S. National Security Agency).
End-to-end (e2ee) encryption for email can be used to ensure
that only the sender and the recipient of a message can read the contents.
PGP is the best solution for secure communications with a partner that is
already using it. Asking your counterpart to start using PGP could be hard.
Enigma is an app based on the SnapPass open source project.
It allows you to share secrets in a secure, ephemeral way.
Input a single or multi-line secret, its expiration time and click Generate URL.
Share the one-time use URL with your intended recipient.
Try it out:
enigma.realsender.com
inxbox demo temporary email

inxbox demo is a ready-to-use temporary mailbox
that receives any message
and keeps it in memory for an hour
!! all received messages are visible to anyone !!
Try it yourself now! (1)
- send a message to: [yourname]@inxbox.realsender.com
- open https://inxbox.realsender.com/monitor and check check for reception
(use Google Chrome browser > New Incognito Window or Microsoft Edge browser)
Try it yourself now! (2) with your own domain
- change/add the MX record of your domain to:
MX “10 inxbox1.realsender.com”
- Send a message to: yourname@yourdomain
- open https://inxbox1.realsender.com/monitor and check check for reception
(use Google Chrome browser > New Incognito Window or Microsoft Edge browser)
pay attention: the associated domain name is different from the previous point
Download the messages via pop3
- configure your email client with the following settings
- Server Type: POP Mail Server
- Server Name (1): inxbox.realsender.com - Port: 110 (Default)
- Server Name (2): inxbox1.realsender.com - Port: 110 (Default)
- User Name: only “yourname” within the recipient address
- Password: any value is accepted
inxsend fake smtp/api service

inxsend is a Fake SMTP/API Service
for testing emails in applications easily
by sending all the messages to a single mail server
SMTP server settings
Configure the smtp server with the following parameters:
Server Name: inxsend.realsender.com
Port: 25 |or| 2525 |or| 587 (+TLS) |or| 465 (+SSL)
User Name: CDED54
Password: 478DED
API server settings
Use API access as described in the “sending via api” instructions, with the following parameters:
Server address: (https://) inxsend-api.realsender.com/mail/send
apiuser: CDED54
apipass: 478DED
Send a test message
Send a message to:
[yourname]@inxbox.realsender.com
!! all received messages are visible to anyone !!
(other recipients will be rejected)
Let us know if you’re facing any issue.
Check reception
Open https://inxbox.realsender.com/monitor and check for reception
(use Google Chrome browser > New Incognito Window or Microsoft Edge browser)
Further information on this mailbox is available at: inxbox demo temporary email.
tester for spf and dkim

RealSender offers a free online check tool
to validate your SPF + DKIM settings sending an email message:
- send an email to spf@tester.realsender.com
- check online the SPF validation results at tester.realsender.com/spf
(it will take a minute to appear)
During verification, a prefix is added to the subject
if the message is not authenticated correctly.
Details on how it works
are located in the “email authentication basics” area of the website:
email authentication basics :: <spf> check online