= subject line

olemus
meilipäise element, mis esitab e-kirja teema
= an email header field that presents the subject of the email

ülevaateid
https://sendpulse.com/support/glossary/subject-line

https://blogs.constantcontact.com/good-email-subject-lines/

https://www.drip.com/blog/fall-email-subject-lines