How to say in mail not recived

You're looking for a polite way to say "not received" in an email. Here are a few options:

1. "Not Received": Simple and straightforward.
2. "Undelivered": This implies that the email was sent but didn't reach the recipient's inbox.
3. "Failed to Reach": This phrase suggests that the email was sent but didn't successfully deliver to the recipient's mailbox.
4. "Did Not Arrive": This phrase is similar to "not received" and is a polite way to acknowledge that the email didn't reach the recipient.
5. "Delivery Failure": This phrase is a bit more formal and implies that there was an issue with delivering the email.
6. "Email Not Delivered": This phrase is clear and concise, and gets the point across.
7. "Recipient Not Reached": This phrase is a bit more formal and implies that the email was sent but didn't reach the intended recipient.

Here are some examples of how you could use these phrases in an email:

• "I sent you an email on [date] but it appears it was not received. Could you please confirm receipt?"
• "Unfortunately, the email I sent on [date] was undelivered. I'll try sending it again."
• "I tried sending you an email on [date] but it failed to reach your inbox. "
• "I sent you an email on [date] but it did not arrive. Could you please check your spam folder and let me know if you received it?"

Remember to always be polite and courteous in your email, and try to provide as much information as possible to help the recipient troubleshoot any issues.