Select one of your SMS conversations or one of your MMS attachments and send it via email to your email account or to any other email account. The app does not support automatic forwarding of SMS or MMS to an email. The forwarding to an email account must be performed manually. There is free trial version which you can download and use for one day.
YCdroid is the developer of SMS MMS to Email that can be found in the Productivity category. Over 5K users downloaded and installed the tool and the latest update was on Oct 9, 2020. The average score for this application is 3.4 on Google Play.
Take the opportunity to get the installation package of SMS MMS to Email 1.12 for free and have a look at users' reviews on Droid Informer. The app is designed for Android 3.0 and above. The download of the app doesn't contain viruses or any kind of malware.