anti-spam

Long gone is the day where your server program can just send emails to anyone without getting rejected or filtered as spam.

This is especially true with email to Yahoo users. It appears that Yahoo just out-right dismisses any email that's not signed with DomainKeys. Your non-DomainKeys-signed emails will not even appear in a Yahoo user's spam box.

In my testing, hotmail/live mail puts non-DomainKeys-signed emails into spam box. Even though GMail checks DomainKeys and SPF record, it is most liberal in letting emails through even when emails doesn't have DomainKeys signing or SPF record.

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The day where your server program can just send emails to anyone without getting rejected or filtered as spam is long gone because of the exploiting email spamming program.

In order to ensure successful email delivery to GMail, MSN(Hotmail/Live), AOL email addresses, you need to use SPF(Sender Policy Framework)

1. Make sure your mail server is not openly relaying emails.
2. Gather the list of IPs where your server program(s) will send emails from for your domain.
3. Set up reverse DNS to associate your domain name with the IPs.
4. Use Sender ID Framework SPF Record Wizard or The SPF Setup Wizard to generate SPF record.

Tags: email delivery anti-spam spf gmail hotmail live.com aol