What is white listing? A white list is basically a list or legitimate/non spammy domains that services such as Hotmail, Yahoo etc have. If you can get on the list there is a very low chance that the messages you send will reach you receivers spam folder Email1and1. However if you make your emails too spammy you can be removed.
Every email account has its own white list, so you can request in your emails that your followers should add you to their list to avoid missing important emails. This is easily done in the followers options, but varies depending on whether they use Gmail, Hotmail etc.
You must realise that emails go into a person’s junk mail folder for a number of reasons and a lot of it can be to do with how you write your emails. Email services have controls put into place to identify if an email is spam. To overcome this there are software services that will give you a ‘spam score’ so you can see the chances of your email being sent to the junk mail box. There are certain things to avoid such as not using a lot of CAP writing, a lot of colourful texts etc. Just keep it professional.
Another control email services use is to identify if you’re sending emails to email addresses that don’t exist or have been disabled. This is because spam emails are sent to large mailing lists and not to a set of close followers. If the service providers identify you sending emails to disabled addresses your domain will be given a high spam score meaning your future emails will most like always hit the junk mail folder.
Another control the email service providers have in place is identifying how many emails you’re sending at a time. If you’re sending lots of emails to thousands and thousands of people ate once it may mark your email as spam, and yes, you guessed it… your email is being dropped in the junk email folder. Each provider’s settings vary on the amount, so just send the emails to a handful at a time (maybe a few hundred to thousand).