An invalid email occurs when you attempt to send email to an address that is formatted in a manner that does not meet internet email format standards or the email does not exist at the recipient's mail server. Examples include addresses without the “@” sign or addresses that include certain special characters and/or spaces. This response can come from our own server or the recipient mail server.
Before you send, SendGrid does a check against the format of the email address to attempt to verify its validity. If the recipient server checks the address and doesn't find it, they will send back a 550 bounce to say that this is an invalid email address.
The list provided here can be filtered by email address or date.
In the top right corner, you will see a calendar icon. Click this and choose the dates you would like to search between. Your recipient list will refresh, showing the invalid email address reports from between those dates.
When you select the checkboxes next to the recipient names or select all, using the checkbox next to the search box, you will see a new button at the top of the page. From this list, you can choose to remove the selected recipients from the list.
You can download your list as a CSV by clicking the gear icon at the top of the page and selecting “Download CSV.” The file will download in your browser right away.