There are several methods and tools to check and improve your email deliverability:
Spam Testing Tools: Tools like SpamAssassin and MailTester can help you test if your email will be flagged as spam. Sender Score: Services like SenderScore.org provide a rating of your email sending reputation. Inbox Placement Testing: Tools like GlockApps and Litmus can show you where your emails are landing, whether in the inbox, spam folder, or not delivered.