Can we write dear mam in mail

In formal correspondence, it's generally considered more professional to use "Dear Mother" or "Dear Mom" instead of "Dear Mam". Here's why:

That being said, if you're writing to your mother in a more casual or personal context, such as a text message or a social media post, you can definitely use "Dear Mam" if that's how you normally address her.

Here's an example of a formal letter:

Dear Mother,

I hope this letter finds you well. I wanted to take a moment to express my gratitude for everything you've done for me.

Best regards, [Your Name]

And here's an example of a more casual text message:

Hey Mam, just wanted to say thanks for everything. Love you!

Remember to always consider your audience and the context when choosing how to address your mother in your writing.