Our emails are sent from firstname.lastname@example.org, but we also set the
Reply-To: header for certain emails so a reply goes to the intended party.
Actually, yes it is a valid email address. The equals character (
perfectly valid in the local part of an email address. Sources:
We use SendGrid for the transactional emails that come from our application. SendGrid cryptographically signs all of our emails with DKIM, which matches the sendgrid.info sending address. This allows a receiving mail server to verify the delivery was sent from who we say it was sent from.
Because SendGrid is delivering email on our behalf, we employ the Sender Policy Framework (SPF) for mail delivery to verify the sendgrid.net mail server. i.e We have DNS records that verify which servers are allowed to send email on our behalf. Combined with DKIM, this should override most spam filters.
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anytime if you have any questions.