Can we know recipient see mail

You're asking if it's possible to know if the recipient has seen or opened an email.

The answer is: it depends on the email client and settings used by the recipient.

Here are some ways to determine if the recipient has seen or opened an email:

1. Read Receipts: Some email clients, like Microsoft Outlook, allow you to request a read receipt from the recipient. This sends a notification to your email account when the recipient opens the email. However, this feature is not universally supported and may not work with all email providers.
2. Tracking Pixels: Some email marketing platforms and services use tracking pixels to track the recipient's behavior, including whether they've opened the email or clicked on links. These pixels are usually invisible to the recipient and can provide insights into email engagement.
3. Email Client Settings: Some email clients, like Gmail, allow you to see when an email has been opened or read. For example, in Gmail, you can see a "Seen" timestamp next to the email in your inbox.
4. Third-Party Tools: There are various third-party tools and services that can help you track email opens, clicks, and other engagement metrics. These tools often use tracking pixels or other methods to gather data.

However, it's important to note that:

• Not all email clients support read receipts or tracking pixels.
• Recipients may have settings that prevent tracking or read receipts.
• Some email providers may block tracking pixels or read receipts.
• Even with tracking pixels, you may not be able to determine if the recipient has actually read the email, only that they've opened it.

In summary, while there are ways to determine if a recipient has seen or opened an email, it's not always possible to know for certain.