Howdy new message ajustment

You should change the text on the Transifex and then download a modified .mo file with your text.

The file path is usually: wp-content\plugins\wysija-newsletters\languages\wysija-newsletters-de_DE.mo (as an example, for German)

Instructions on how to do that here: https://support.mailpoet.com/knowledgebase/translations-in-your-language/