Add subject customization #118 (#141)

* go.mod update to 1.17 and dependency synchronisation

* Docker file update to use go 1.18 and "go install" instead of "go get"

* Minor documentation updates

* GitHub action version updates

* goreleaser-action version fix

* Add subject customization #118

Co-authored-by: Sandeep Singh <sandeep@projectdiscovery.io>
Co-authored-by: forgedhallpass <13679401+forgedhallpass@users.noreply.github.com>

README.md

@@ -127,6 +127,7 @@ smtp:
     smtp_cc:
       - to@email.com
     smtp_format: "{{data}}"
+    subject: "Email subject"
 
 custom:
   - id: webhook

pkg/providers/smtp/smtp.go

@@ -23,6 +23,7 @@ type Options struct {
 	FromAddress string   `yaml:"from_address,omitempty"`
 	SMTPCC      []string `yaml:"smtp_cc,omitempty"`
 	SMTPFormat  string   `yaml:"smtp_format,omitempty"`
+	Subject		string	 `yaml:"subject,omitempty"`
 }
 
 func New(options []*Options, ids []string) (*Provider, error) {
@@ -42,7 +43,7 @@ func (p *Provider) Send(message, CliFormat string) error {
 	for _, pr := range p.SMTP {
 		msg := utils.FormatMessage(message, utils.SelectFormat(CliFormat, pr.SMTPFormat))
 
-		url := fmt.Sprintf("smtp://%s:%s@%s/?fromAddress=%s&toAddresses=%s", pr.Username, pr.Password, pr.Server, pr.FromAddress, strings.Join(pr.SMTPCC, ","))
+		url := fmt.Sprintf("smtp://%s:%s@%s/?fromAddress=%s&toAddresses=%s&subject=%s", pr.Username, pr.Password, pr.Server, pr.FromAddress, strings.Join(pr.SMTPCC, ","),pr.Subject)
 		err := shoutrrr.Send(url, msg)
 		if err != nil {
 			err = errors.Wrap(err, fmt.Sprintf("failed to send smtp notification for id: %s ", pr.ID))