Sending a plain text version of your card without images can help ensure messages are delivered to the inbox.
How to Send Cards as Plain Text
Step 1: Click the “Send” step.
Step 2: Select contacts using the checkboxes. To quickly select all displayed contacts, use the checkbox in the very top left of the mailing list grid. You will know which contacts are selected, because the row will change to a light green.
Step 3: Once all the desired contacts are selected, click the green "Send Invitations" button at the top right.
Step 4: On the resulting pop up, click the "Other Sending Options" toggle and check the "Send Plain Text" box.
Step 5: Click "Send" to continue.