Constant Contact has an option called “Authentication” that you can turn on (or off, if desired) directly from within your account. A lot of people might have heard the term authentication, but maybe not know how it can help them with their Constant Contact accounts.
Definition: Email Authentication is a way to verify that an email is actually coming from the sender it claims to be coming from and for good emailing practices to be electronically tracked. It can help defeat email scams that involve spoofing, allow senders to be recognized in the industry as reputable email marketers and has several other benefits.
By turning this option on in your account, you clarify to receiving ISPs (Internet Service Providers) that you have authorized our servers to send these emails. What does this mean in return? It means that your emails will have a higher chance of being delivered to your customers in boxes and not into a spam/junk folder, and have less of a chance of being bounced back by the ISP.
Some things to know before turning Authentication on:
The sender header address does not take the place of your "from" address, and will not affect your status on Safe Sender lists.
There is NO change to the look of your unopened email in the inbox.
Some email clients choose to make the address in the Sender header visible when the email is opened.
The sender header address may appear differently depending on the email client.
We create a registered sub-domain of ccsend.com in which your unique authentication credentials are published. (CCsend.com is a domain used by Constant Contact to manage our customers' authentication credentials.)
To turn Constant Contact Authentication on:
Click on the profile head, then select “My Settings” from the drop down.
Click “off next to “Authentication” in the box labeled “other” on the right side of the “My Settings” page. This will prompt you to create your sender header address. (Note: This address can be anything, but will always end with ccsend.com)