Based on our record, Mailhardener seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You don't. I'd run your domain through the configurations at mailhardener.com and build a shrine to the SMTP Gods. Source: about 2 years ago
PowerDMARC - Stop hackers to send emails from your domain
Mailgun - A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.
EasyDMARC - Cloud Native DMARC
Mandrill - Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.
DMARCLY - DMARCLY helps stop email spoofing, phishing, spam, business email compromise, ransomware, and improves email deliverability.
PHPMailer - Email sending library for PHP.