Truncation is a common issue when sending emails, as mail servers may cut off the ends of messages that are too long. This means that the email sent back was too long, and the server returned it instead of sending all the parts. A truncated message usually means that the message contains more characters than is allowed to be displayed in the message field. The reason why the message is truncated is because the server doesn't see the point of returning the entire message in a return message.
This can be frustrating after spending time on an email, only to find it has been cut off. It's important to consider sentence structure when writing emails, as short, simple sentences or truncated sentences can create tension, haste or urgency, while longer compound or complex sentences are slower and often appear in formal texts. Unfortunately, you can't stop Gmail from truncating your message, but you can take precautions to avoid it. When sending an email to a user, most of the time a Yahoo user, and Yahoo returns a bounce to your Gmail account, that bounce is most of the time truncated.
To prevent this from happening, you should scroll to the bottom of your email before sending it to make sure it isn't too long. If you do find yourself with a truncated email, there are still ways to recover it. You can contact the recipient and ask them to resend the email if they still have it. If they don't have it anymore, you can try searching for it in your sent folder or in your deleted items folder.
If all else fails, you can try using an email recovery tool such as Email Recovery Pro or Email Undelete Pro.