Highly appreciated in email

Here are some examples of phrases that can be used to express "highly appreciated" in an email:

1. "Thank you so much for your [help/support/kindness]. It is highly appreciated!"
2. "I want to express my sincere gratitude for [specific action or gesture]. It is greatly appreciated!"
3. "Your [effort/time/contribution] is highly valued and appreciated!"
4. "I am deeply grateful for [specific benefit or outcome]. It is truly appreciated!"
5. "Your [help/advice/suggestions] have been incredibly helpful and are highly appreciated!"
6. "I want to take a moment to express my heartfelt appreciation for [specific action or gesture]. It is highly valued!"
7. "Your [generosity/support/kindness] is highly appreciated and will not be forgotten!"
8. "I am thrilled to express my gratitude for [specific achievement or milestone]. It is highly appreciated!"
9. "Your [input/contribution/feedback] is highly valued and appreciated!"
10. "I want to extend my sincerest thanks for [specific action or gesture]. It is highly appreciated!"

Remember to always be sincere and specific when expressing gratitude in an email. It's also a good idea to keep the tone professional and polite, even if you're writing to a friend or colleague.