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Make receiver hostname configurable via --receiver-hostname flag

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Remove the package-level global hostname from parser.go.

Adds a log warning when the last Received hop doesn't match the
expected receiver hostname.

Bug: https://github.com/happyDomain/happydeliver/issues/11
This commit is contained in:
nemunaire 2026-03-25 10:58:34 +07:00
commit 76ee50a100
18 changed files with 53 additions and 40 deletions
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11
internal/receiver/receiver.go
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@ -98,6 +98,17 @@ func (r *EmailReceiver) ProcessEmailBytes(rawEmail []byte, recipientEmail string
log.Printf("Analysis complete. Grade: %s. Score: %d/100", result.Report.Grade, result.Report.Score)
// Warn if the last Received hop doesn't match the expected receiver hostname
if r.config.Email.ReceiverHostname != "" &&
result.Report.HeaderAnalysis != nil &&
result.Report.HeaderAnalysis.ReceivedChain != nil &&
len(*result.Report.HeaderAnalysis.ReceivedChain) > 0 {
lastHop := (*result.Report.HeaderAnalysis.ReceivedChain)[0]
if lastHop.By != nil && *lastHop.By != r.config.Email.ReceiverHostname {
log.Printf("WARNING: Last Received hop 'by' field (%s) does not match expected receiver hostname (%s): check your RECEIVER_HOSTNAME config as authentication results will be false", *lastHop.By, r.config.Email.ReceiverHostname)
}
}
// Marshal report to JSON
reportJSON, err := json.Marshal(result.Report)
if err != nil {