Once configured it is a good practice to verify email servers SPF and DKIM records ensuring proper email deliverability. The process is very simple just send an email to check-auth@verifier.port25.com from the configured email server/domain and you will receive an email response with verification report in it. If things are configured correctly the report will show "PASS" as shown below.

Google Apps offers an excellent email service for businesses, anybody having a domain name can offer anyemail@theredomain.com email accounts with full Gmail features by just changing a few MX record entries in there DNS options and configuring there web-applications to use Google's server for emailing.

To ensure better email delivery rate to user's inbox avoiding chances of being tagged as SPAM, there are systems in place which allows email sending server to verify email origin (a sort of digital signature) and let SPAM categorization algorithms decide whether the email is sent from a fake "From" origin address or a real one.

Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) are two such measures and here is how to set them up for emails originating from Google Apps servers for your domain.

Posting emails addresses on public forums and webpages is a sure shot way to get your email address picked by Spam Bots and get listed on spam lists, the most common hack used to prevent SPAM BOTS is to post email address in malformed state for example xyz@abc.com can be posted as xyz [AT] abc.com but as spam harvesters get smart with ever evolving algorithms this is not a fool proof method, similarly Javascript email encoders can also be decoded and e-mail captured.

reCAPTCHA Mail Hide is a simple, fast, fool-proof and free solution to the problem, reCAPTCHA Mail Hide brings proven CAPTCHA based spam protection to prevent your email address from automated email harvesters, using reCAPTCHA Mailhide is very simple just visit this page and submit the email address you wish to protect and post on internet, the service will then give you a simple copy and paste HTML code and a unique URL which you can post on webpages, blogs, comments and forums, the html code snippet will display your partial email address and revealing the full e-mail address requires users to solve a CAPTCHA.

Protected Email Address