E-Mail authentication is used by a number of ISPs, large and small, in the fight against spam.  E-Mail which has been authenticated ensures that it has been sent from a server which is legitimately allowed to send mail for the sending domain, improving deliverability and sometimes reducing the chance of it being flagged as spam.

Some webmail services also provide a visual indication to the user receiving the mail that e-mail has been authenticated and successfully verified.   For example in Yahoo! webmail the user will see a small symbol with a key next to the sender's e-mail address.  This visual indication shows you have taken the time and effort to authenticate your domain and can project a more professional image.

Above, how an e-mail would display in Yahoo! webmail when if has been successfully authenticated by DomainKeys and below how it would look if it had not been.

It's fairly easy to setup authentication in Suite26.  All you need to do is choose a domain you wish to send mail from (we recommend using a sub-domain or one specially registered for the purpose) and add that domain to Suite26.   We will provide you with 4 entries that need to be made to the DNS for that domain.  Once those entries have been made, any mail you send from that domain via Suite26 will be authenticated.

For more details, please visit our Help Centre and read the article about E-Mail Authentication and once you are ready to set it up please read our setting up E-Mail Authentication article.