We have been configuring webmails for our clients for a while now, and since we like helping people and we live by DIY First (Do It Yourself First). So we will explain some of the things you need to do to avoid gmail/ymail etc for spamming your email.
First you have to protect your domain from email spoofing. SPF (Sender Policy Framework) is a DNS (Domain Name System) record that helps to prevent email address forgery. An attacker can make false email headers making it seem that they are sending emails from your domain. This would risk your domain being banned or all your emails spam checker may assume they are spams.
DKIM (DomainKeys Identified Mail) is a mail authentication method developed to help detect forged sender addresses in emails, a common technique used in phishing and email spam. to learn more about this visit www.dkim.org. It allows senders to associate a domain name with an email address, thus vouchering for its authenticity.
Finally the less common DMARC (Domain-Based Message Authentication, Reporting and Conformance) is a technical standard for protecting email senders and receivers form spam, spoofing and phishing. It allows definition and publication of policy that defines an organisation email authentication practices and provides instructions to the receiving mail server on how to enforce them. Learn more by visiting dmarc.org.
The final thing we tell our clients is to send professional emails. spam filters reads through your email before delivering them, an email without a subject is a clear red flag to the spam filter. Test your domain using seo tools such as mxtoolbox.com and google mx checker
We offer email configuration services at a reduced price, to help you have a professional looking email without paying much.