the line on the e-mail message that tells you what it's about

listen to the pronunciation of the line on the e-mail message that tells you what it's about
Английский Язык - Английский Язык

Определение the line on the e-mail message that tells you what it's about в Английский Язык Английский Язык словарь

the line on the e-mail message that tells you what it's about
subject line