When using one.com's mail service to send newsletters we ask you to follow a few simple guidelines. They help your newsletter to meet current standards and reach its recipients.
1 - Only send mail to recipients who have signed up
We advise a double subscribe mechanism. Let the recipients actively sign up for your newsletter, and then let them confirm the subscription, by clicking a link on your website. In some countries it's forbidden to send unsolicited bulk mail, so make sure that your recipients want to receive your newsletter.
2 - Add an unsubscribe option
Add an unsubscribe option to your newsletter by adding a link to your website that explains how to unsubscribe. Another option is to provide an email address that your subscribers can send an unsubscribe message to. Emails without an unsubscribe feature get automatically blocked by spam filters.
3 - Avoid suspicious content
Spam filters check all emails. How these filters work is not public, since it would give spammers the knowledge needed to bypass these filters. Keep the following tips in mind:
- Use a subject that fits with your message
- Don't use all caps or a lot of exclamation marks
- Don't send an email that only contains an image and no content.
Spam filters cannot read images, so they suspect that you are trying to trick them.
- Don't link to unverified sites
The email might get blocked, if browser filters block the site you are linking to like "Google Safe browsing" etc., or if a link on the website you are linking to is blocked. Note that it is the domain and not the URL that gets blocked.
4 - Send emails in batches
Our servers handle a limited amount of emails at a time, to make sure that all emails end up where they should. Our servers allow you to send 25 emails per 5 minutes, or to 250 recipients per 5 minutes. If you want to have more information about the limits, please contact our support.
5 - Keep your mailing list updated
Make sure that you remove addresses from bounced emails from your mailing list. By keeping your mailing list up-to-date, you avoid sending emails to non-existing addresses.
And you don't cause extra load on our mail servers.