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set Helo as sender domain when empty #55

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set Helo as sender domain when empty #55

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8 changes: 8 additions & 0 deletions email.go
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ import (
"net/mail"
"net/textproto"
"strconv"
"strings"
"time"

"github.com/toorop/go-dkim"
Expand Down Expand Up @@ -786,6 +787,13 @@ func (server *SMTPServer) Connect() (*SMTPClient, error) {
tlsConfig = &tls.Config{ServerName: server.Host}
}

if server.Helo == "" {
atIndex := strings.LastIndex(server.Username, "@")
if atIndex >= 0 {
server.Helo = server.Username[atIndex+1:]
}
}

// if there is a ConnectTimeout, setup the channel and do the connect under a goroutine
if server.ConnectTimeout != 0 {
smtpConnectChannel = make(chan error, 2)
Expand Down