our setup does not allow us to change SPF records. Which is fine - but we would like to utilize the "On Behalf of" or "Via" by using a "Sender" mail header. This forum post from 2015 explains that CiviCRM does not have the "Sender" mail header - but is there any work on this? Both MailChimp and SalsaLabs have this feature.
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I'm 99% sure there hasn't been any work on this.
answered Feb 14 '18 at 3:48
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If there's a hook that allows changing the mail headers, this would only be a few lines of code to implement as an extension. Implementing a hook itself is only a few lines of code, so someone could conceivably write the hook, then the extension. – Jon G - Megaphone Tech Feb 15 '18 at 20:20
