Understanding Nylas email headers

Nylas has more headers because the outbound server requires identifiable information when delivering email to their SMTP server. View the example below.

Received: from 316292377349 named unknown by gmailapi.google.com with HTTPREST; Wed, 19 Jan 2022 00:22:11 -0800
Received: from 86-91-255-117.opennet.kpn.net (86-91-255-117.opennet.kpn.net [86.91.255.117]) by api.nylas.com (Nylas) with HTTPREST id 57xktlb0e5v06k7wgvup5psls-0; Wed, 19 Jan 2022 08:22:11 +0000 (UTC)
User-Agent: Nylas-nylas.com/18.1.0

The User-Agent value is required according to HTTP standards and protocol. It contains information regarding your application's name. It does not affect deliverability.

Some SMTP server may strip content from headers or mark the email as SPAM if the headers are manipulated via RAW MIME.

Updated May 13, 2022 12:15