single-line text emails
The “plainmail” app reduces your emails to a single line of text,
it makes email attachments disappear, sending links instead:
Squeeze your emails
Simply add “.plain” to the recipients’ email domain,
they will receive only the subject:
Recipient: email@example.com.plain
Subject: your short message, emoticons are allowed
Additional email content and attachments are ignored,
in their place, the following message will appear:
< PlainMail app >
All content except the subject line has been removed.
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Convert email attachments into links
Just write “[A]” in the subject and add an attachment to the email.
The “plainmail” app will automatically convert it into a link.
The domain in the link can be any dedicated domain or subdomain you wish to use.
The file will be DELETED after six months.
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notifications to the ntfy app
What is ntfy?
ntfy (pronounced “notify”) works as a “publish-subscribe” notification service,
in which you send a message to a “topic.” A smartphone or computer running the ntfy app
and subscribed to the same topic receives the message as a real-time push notification.
This allows for the delivery of instant alerts generated by scripts, servers, or any other service,
allowing users to receive notifications without complex configuration.
How it works with RealSender:
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Publishers:
you can publish messages on a topic via email by sending an email to a specific address.
For example, you can publish a message by sending an email to topic@ntfy.youremaildomain.com.
The message content matches the email subject.
Only RealSender users are authorized to send emails to this address
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Subscribers:
they receive notifications via their smartphone or computer,
with the ntfy app installed and the topic they’ve subscribed to
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Topics:
think of topics as channels, with unique names and streams of events that are published within them.
You don’t need to explicitly create topics; just choose a name and use it.
Topic names are public, so it’s wise to choose something that cannot be guessed easily
After the email is sent, the ntfy server receives the message and stores it for that topic’s subscribers.
A subscriber (via the ntfy app) is connected to the topic and receives the message in real time.
It’s a “decoupled system”, publishers don’t need to know their subscribers, and vice versa.
This simplifies its use and management, both for the publisher and the subscriber.
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Convert email attachments into links
Just write “[A]” in the subject and add an attachment to the email.
The “plainmail” app will automatically convert it into a link.
The domain in the link can be any dedicated domain or subdomain you wish to use.
The file will be DELETED after six months.
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messages to mobile numbers
Connect your emails to the mobile world,
maximize your business communication opportunities,
without changing your work habits:
Send text messages from your email
Push notifications are the most effective way to reach your customers quickly.
With super high open rates (up to 95%) and top response rates (up to 45%).
– source: Gartner study on Text Messages, year 2019
Recipient: mobilenumber@text.yourdomain.com
Subject: the text message content, emoticons are allowed
(additional email content and attachments are ignored)
We will provide you with an industrial router pre-configured for your mobile operator.
Control over the sending and delivery of text messages must be carried out via the operator used.
Our system checks every ten minutes that the router is responding (check power and internet connection).
To avoid abuses, messages must be sent via RealSender, using pre-authorized senders,
with the SPF and DKIM “strict” alignment. Learn more on email authentication - advanced.
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Receive text messages in your email
The text message replies will be delivered directly to your preferred mailbox,
with an email message like this:
Subject: Text-Message (+41790000000)
Below is the received text message. It was submitted by
(+41790000000) on Monday, July 29, 2025 at 10:57:00 CEST
---------------------------------------------------------------------------
Test Message
---------------------------------------------------------------------------
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Reply to text messages from your email
RealSender’s “plainmail” app lets you send text messages directly from your EMAIL.
So you can reply from your favorite email application.
The recipient address is already filled with the original sender number:
Recipient: mobilenumber@text.yourdomain.com
Subject: the content of the reply
(additional email content and attachments are ignored)
The conversation between email application and mobile device can thus continue.
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Convert email attachments into links
Just write “[A]” in the subject and add an attachment to the email.
The “plainmail” app will automatically convert it into a link.
The domain in the link can be any dedicated domain or subdomain you wish to use.
The file will be automatically DELETED after six months.
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Request a free trial
