Can we sent a mail with other existing mail address

You're asking if it's possible to send an email using an existing email address, but with a different sender address. The answer is yes, but it depends on the email service provider and the specific settings.

Here are a few ways to achieve this:

  1. Forwarding: You can set up forwarding rules on your email account to forward incoming emails to another email address. This way, when someone sends an email to your existing email address, it will be forwarded to the new email address.
  2. Email aliases: Some email providers, like Gmail, allow you to create email aliases. An alias is an alternative email address that forwards emails to your primary email address. You can create an alias with a different sender address, and emails sent to that alias will be sent from the new address.
  3. Email relaying: Some email providers, like Microsoft Exchange, allow you to set up email relaying. This allows you to send emails from one email address to another, using the new email address as the sender.
  4. Third-party services: There are also third-party services, like Mailgun or Sendgrid, that allow you to send emails using a different sender address. These services often require you to set up an account and configure your email settings.

Here are some examples of how to set up these options:

Keep in mind that some email providers may have restrictions or requirements for using a different sender address. Be sure to check your email provider's documentation and terms of service before setting up a new sender address.