Step by Step: (CSV)

• Create a New Message (“File → New → Message”)
• Add the Variable(s) to To, e.g.:

  {{Email}} or {{FirstName}} {{LastName}} <{{Email}}>

• Add other Recipients to Cc (optional) (variables are supported)
• Add other Recipients to Bcc (optional) (variables are supported)
• Add the Subject (variables are supported)
• Add the Body (variables are supported)

  Kedves {{name}}!
  
  bla bla {{param}}
  
  neduddki

• Add the Attachments (optional)
• Click “File → Mail Merge”
• Select “CSV” and check “Deliver Mode”
• Add (individual) Attachments (optional) (variables are supported)
• Select “Filename” and check “Character Set”, “Field Delimiter” and “Text Delimiter”
• Check “Start”, “Stop” and “Pause” (optional)
• Click “OK”

Ha magyar a win, akkor nem UTF8, hanem win1252!!!!!!!!!!!!!!!!!!

Windows 1252

https://addons.thunderbird.net/hu/thunderbird/addon/mail-merge/