https://mailtrap.io/blog/spf-records-explained/
SPF record is a DNS record to protect your emails from being forged. Learn about the Sender Policy Framework to increase the credibility of your product.
spfsetuprecordmailtrap
https://mailtrap.io/blog/python-mail-merge/
Mail merge enables the easy integration of database information to an email template with placeholders. Learn how it works in Python.
simple mailmailtrap blogmergepython
https://mailtrap.io/blog/smtp-auth/
SMTP authentication protects your mail server from unauthorized use. Learn more about SASL mechanisms, ports, and errors associated with SMTP AUTH.
smtp authenticationmailtrap bloghandle