Received Header Chain Parser
Each Received header is one hop. Parsing them in order shows the message's journey from origin MTA to final delivery, useful for delays and spoofing checks.
- Hop 2: from
internal.sender.com→ bymail.sender.comSun, 25 May 2026 14:59:55 +0000 - Hop 1: from
mail.sender.com→ bymx.gmail.comSun, 25 May 2026 08:00:01 -0700
You checked one email. Outsolvi follows every one you send.
The analyzer looks at an email before it goes. Outsolvi shows what happened after: graded opens, clicks and replies for every email you send from Outlook or Gmail. From $7/user/mo billed yearly, 14-day free trial.
Track your next sendParses each Received line from a raw message (from, by, with, id, for, timestamp) and lays the hop chain out in order, so you can see which host handed off to which. Read the timestamps down the chain to find the slow hop or an unexpected relay.
Investigating slow delivery. Investigating suspected spoofing or relay abuse.
FAQ
Which headers do I paste in?+
Just the Received: lines from the raw message source. In Gmail that's Show original, in Outlook it's message options or View source. Extra headers around them are ignored, only lines starting with Received: get parsed.
Does it flag spoofing or calculate the delay between hops?+
No. It pulls the from host, the by host, and the timestamp out of each Received line and lists them in origin to destination order. Comparing the timestamps to spot a slow hop, and judging whether a host looks wrong, is still a manual read.
Do my headers get uploaded anywhere?+
No. The parsing runs in your browser on the text in the box. Nothing is sent to a server, so pasting headers from a real message is fine.
Keep going
Articles, glossary entries, and other tools on the same topic.
Nate built Outsolvi after watching every email-tracking tool he had ever used lie to him about opens. Outsolvi grades every open as a person or a machine, in Outlook and Gmail, so the number on the dashboard is one a rep can actually act on.
We update these pages when the underlying mechanics change. new mailbox-provider rules, new tracker behavior, new measurement gaps. The dates above are real revisions, not auto-touches.