A Finnish work email is famously brief. Three lines are perfectly polite; padding them with pleasantries can read as insincere.

Part	Typical Finnish	English
Greeting	Hei Tuula, / Hei,	Hi Tuula, / Hello,
	Hyvä Tuula Järvinen,	Dear Tuula Järvinen, (more formal)
	Hyvä vastaanottaja,	Dear Sir or Madam,
Opening	Kiitos viestistäsi.	Thank you for your message.
Request	Voisitko lähettää…?	Could you send…?
	Olisin kiitollinen, jos…	I'd be grateful if…
Attachment	Liitteenä on…	Please find attached…
Follow-up	Palaan asiaan pian.	I'll get back to you soon.
Closing	Ystävällisin terveisin	Kind regards
	Parhain terveisin / Terveisin	Best regards / Regards

• Hei is fine even with people you've never met; most Finnish work emails start that way.
• Arvoisa… (esteemed) belongs only to very official letters — avoid it.
• No comma after Ystävällisin terveisin: the name simply follows on the next line.