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Simplify Message-ID generation
Updated the SetMessageID method to generate a "Message-ID" using a single randomly generated string combined with the hostname, replacing the prior complex format that included process ID and multiple random numbers. This change simplifies the code of the generated IDs.
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parent
5c8b2fc371
commit
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2 changed files with 8 additions and 12 deletions
18
msg.go
18
msg.go
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@ -972,12 +972,12 @@ func (m *Msg) Subject(subj string) {
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// SetMessageID generates and sets a unique "Message-ID" header for the Msg.
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//
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// This method creates a "Message-ID" string using the current process ID, random numbers, and the hostname
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// of the machine. The generated ID helps uniquely identify the message in email systems, facilitating tracking
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// and preventing duplication. If the hostname cannot be retrieved, it defaults to "localhost.localdomain".
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// This method creates a "Message-ID" string using a randomly generated string and the hostname of the machine.
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// The generated ID helps uniquely identify the message in email systems, facilitating tracking and preventing
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// duplication. If the hostname cannot be retrieved, it defaults to "localhost.localdomain".
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//
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// The generated Message-ID follows the format
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// "<processID.randomNumberPrimary.randomNumberSecondary.randomString@hostname>".
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// "<randomString@hostname>".
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//
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// References:
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// - https://datatracker.ietf.org/doc/html/rfc5322#section-3.6.4
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@ -986,13 +986,9 @@ func (m *Msg) SetMessageID() {
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if err != nil {
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hostname = "localhost.localdomain"
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}
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randNumPrimary := randNum(100000000)
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randNumSecondary := randNum(10000)
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randString, _ := randomStringSecure(17)
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procID := os.Getpid() * randNumSecondary
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messageID := fmt.Sprintf("%d.%d%d.%s@%s", procID, randNumPrimary, randNumSecondary,
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randString, hostname)
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m.SetMessageIDWithValue(messageID)
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// We have 64 possible characters, which for a 22 character string, provides approx. 132 bits of entropy.
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randString, _ := randomStringSecure(22)
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m.SetMessageIDWithValue(fmt.Sprintf("%s@%s", randString, hostname))
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}
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// GetMessageID retrieves the "Message-ID" header from the Msg.
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@ -786,8 +786,8 @@ func TestMsg_SetMessageIDWithValue(t *testing.T) {
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// TestMsg_SetMessageIDRandomness tests the randomness of Msg.SetMessageID methods
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func TestMsg_SetMessageIDRandomness(t *testing.T) {
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var mids []string
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m := NewMsg()
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for i := 0; i < 50_000; i++ {
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m := NewMsg()
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m.SetMessageID()
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mid := m.GetMessageID()
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mids = append(mids, mid)
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