If you are going out of your room or house unfortunately you have missed to send a text email and you have logged out from email account. In this case you can use send-email.org

Send-email.org provides free anonymous email service where you can send email from your own email address, without logging into your email account.

Sending anonymous email

After sending email we got email within one minute and the text content without any watermarks or information regarding anonymous email. You can also make fun with your friends by sending mail from your friends address.

Website : www.send-email.org

Note : you should not use this service for any other illegal purpose.