https://sinch.com/state-of-customer-communications/chapter/informed/
Keep customers informed with transactional messages - Sinch
Jul 22, 2026 - Ensuring consumers stay informed is a key piece of the digital communications puzzle. Find out more about how these messages impact the customer journey.
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https://www.mailgun.com/releases/added-arc-support-to-inbound-messages/
Added ARC support to Inbound Messages - Transactional Email API Service For Developers | Mailgun
Jun 30, 2025 - We have added ARC headers to all inbound email routed and forwarded by Mailgun. This change was implemented to better align with policy changes at Google and...
transactional email api