Der einzige Dienstvermittler, den ich gefunden habe, ist zwar kostenlos, schickt aber zuviel Ballast mit:

A Message was received from the mobile number 49177xxxxxxx with the message:

Dieser Dienst ist kostenlos, schickt aber die geheime Adresse offen mit.

If you want to send emails from your mobile, send a message like this:
„the@emailaddress.com message to person“ to 07766 40 41 42. Please
see http://www.sms2email.com for more details.

When you send an email via sms to our gateway, the recipient will see
that it is from yourmobilenumber@sms2email.com. You can arrange for
email replies to be re-routed back to your phone as an sms message if you
sign up for an (aq)sms account. To see how this clever stuff works,
please goto

http://www.sms2email.com/site/sms2email.php

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sms2email.com is a service provided by (aq) limited — http://aql.co.uk.

Text messages to 07766 40 41 42 are charged at your normal
mobile rates.

This service is purely a forwarding service. (aq) limited are not
responsible for any content or for any loss, damage, upset or
offence caused by any messages sent via this service.

If you would rather not allow people to be able to send you emails
via our service using their mobile phones, we offer an OPT OUT
service. This means that by clicking on the link below, we will
block any emails sent to you via our system.

https://www.sms2email.com/site/remove.php?key=

If you have any enquiries, praise or a complaint which cannot be
handled by using our opt out service, please email
enquiries@sms2email.com. We will answer your email as quickly
as possible. Thanks for using sms2email.com.

Die gefette Zeile ist die Nutznachricht, der Rest ist Spam.