Can SPF help on spamming issue?
Sender Policy Framework (SPF) allows software to identify messages that are or are not authorized to use the domain name in the SMTP HELO and MAIL FROM (Return-Path) commands, based on information published in a sender policy of the domain owner. Forged return paths are common in e-mail spam and result in backscatter.
Spammers can use any domain name as their sender address in script mails. We can setup SPF record for your domain to prevent spammers to use your domain as spamming purpose. Although SPF can prevent spammers to use your domain as their spam mails, it might not work for some old servers. For example, if the spammer use your domain to send an email to a server that will not check SPF, the mail will still bounce back to your mailbox. So we can't guarantee setting SPF will fix the problem completely. But as far as I know, common mail providers like yahoo, hotmail and gmail will check SPF.
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