Pick an Open Source project that you like and pick a task. Most open source projects host their repositories on GitHub. One of the great features of GitHub is that each repository comes with an issue tracker – just click the “Issues” link in the left sidebar of any of your favorite repositories to see where you can help. (Ex: jQuery’s issues)
Help prevent email spoofing for outgoing messages. DKIM adds an encrypted signature to the header of all outgoing messages. Email servers that get these messages use DKIM to decrypt the message header, and verify the message was not changed after it was sent.
Use the Google G Suite support link below to learn more:
Set up SPF to prevent spammers from sending unauthorized emails from your domain. This type of spamming is called spoofing. Sender Policy Framework (SPF) is an email security method to prevent spoofing from your domain.
Spoofing is a common unauthorized use of email, so some email servers require SPF. If you don’t set up SPF for your domain, messages could bounce or could be marked as spam.
Learn more at the Google support site using the link below:
Set up Domain-based Message Authentication, Reporting, and Conformance (DMARC) by adding policies to your domain’s DNS records. Policies define how your domain handles suspicious emails. Policies are defined in the form of a TXT record.
There are three possible DMARC policies for how your domain responds to suspicious emails:
Take no action on the message and log it in the daily report.
Mark the message as spam and hold it for more processing (quarantine).
Cancel the message so that it is not sent to the recipient.
Learn more following the below support article from Google G Suite: