gmail-processor for the Go-guerrilla package.
This package is a Processor for the Go-Guerrilla default backend implementation. Use for this in your project if you are using Go-Guerrilla as a package and you would like to add the ability to deliver emails via gmail API's using Go-Guerrilla's default backend.
Import "github.com/flashmob/maildir-processor" or github.com/phires/go-guerrilla to your Go-guerrilla project.
Assuming you have imported the go-guerrilla package already, and all dependencies.
Then, when using go-guerrilla as a package, do something like this
{
"log_file" : "",
"log_level" : "debug",
"pid_file" : "smtptogooglebridge.pid",
"allowed_hosts": ["*"],
"backend_config" :
{
"log_received_mails" : true,
"save_process": "HeadersParser|Header|Hasher|Gmail|Debugger",
"save_workers_size": 3,
"sa_key" : "gsgmailapi-9e49eeb1e33c.json",
"mail_sender": "[email protected]",
"mail_scopes" : "https://mail.google.com/",
"use_original_mail": false,
"additional_body_message": "Please find your attachment",
"save_debug_mails": false
},
"servers" : [
{
"is_enabled" : true,
"host_name":"192.168.1.224",
"max_size": 20971520,
"private_key_file":"config_test.go",
"public_key_file":"config_test.go",
"timeout":160,
"listen_interface":"192.168.1.224:2526",
"start_tls_on":false,
"tls_always_on":false,
"max_clients": 10
}
]
}func (b *Bridge) Start() {
b.smtpServer = guerrilla.Daemon{}
config, errConfig := b.smtpServer.LoadConfig(smtpConfigFile)
if errConfig != nil {
panic(errConfig)
}
b.smtpServer.AddProcessor("Gmail", gmailprocessor.Processor)
err := b.smtpServer.Start()
if err == nil {
println("Server Started!")
} else {
panic(err)
}
for _, host := range config.AllowedHosts {
b.smtpServer.Logger.Info("Allowed Host: ", host)
}
// you need to keep the main thread alive etc.
}See the configuration section for how to configure.
The following values are required in your backend_config section of your JSON configuration file
- sa_key - type string Value - gsgmailapi-9e49eeb1e33c.json (after you create your service account download the file and supply it)
- mail_sender - type string - use this as the mail account you want to send from in google suite.
eg printer@<googleapi-domain>.co.za
make sure in the google admin under the security you sent the "domain wide deligation"
client account and scope permissions
- mail_scopes - type string - set this as your scopes list see point above.
example https://mail.google.com/ defined in // import "google.golang.org/api/gmail/v1
- save_process - type string - backend processes to call example - HeadersParser|Header|Hasher|Gmail|Debugger
- use_original_mail type bool - use this option to send the raw data straight to google.
if false you have the ability to manipluate aything on the message
- additional_body_message - type string - Basic message body to insert if you need one. if the above bool is false
- save_debug_mails - type bool - use this to dump original and revised email to disk.
Starting SMTP Bridge vDEVELOPMENT
time="2025-05-21T11:20:04+02:00" level=info msg="Loaded credentials from file: gsgmailapi-9e49eeb1e33c.json"
time="2025-05-21T11:20:04+02:00" level=info msg="Loaded credentials from file: gsgmailapi-9e49eeb1e33c.json"
time="2025-05-21T11:20:04+02:00" level=info msg="Loaded credentials from file: gsgmailapi-9e49eeb1e33c.json"
time="2025-05-21T11:20:04+02:00" level=info msg="pid_file (smtptogooglebridge.pid) written with pid:170451"
time="2025-05-21T11:20:04+02:00" level=debug msg="making servers"
time="2025-05-21T11:20:04+02:00" level=info msg="Starting: 192.168.1.224:2526"
time="2025-05-21T11:20:04+02:00" level=info msg="processing worker started (#2)"
time="2025-05-21T11:20:04+02:00" level=info msg="processing worker started (#1)"
time="2025-05-21T11:20:04+02:00" level=info msg="processing worker started (#3)"
time="2025-05-21T11:20:04+02:00" level=info msg="Listening on TCP 192.168.1.224:2526"
time="2025-05-21T11:20:04+02:00" level=debug msg="[192.168.1.224:2526] Waiting for a new client. Next Client ID: 1"
time="2025-05-21T11:20:04+02:00" level=info msg="main log configured to stderr"
Server Started!
time="2025-05-21T11:20:04+02:00" level=info msg="Allowed Host: *"
time="2025-05-21T11:23:20+02:00" level=debug msg="[192.168.1.224:2526] Waiting for a new client. Next Client ID: 2"
time="2025-05-21T11:23:20+02:00" level=info msg="Handle client [192.168.1.10], id: 1"
time="2025-05-21T11:23:20+02:00" level=debug msg="Writing response to client: \n220 192.168.1.224 SMTP Guerrilla(unknown) #1 (1) 2025-05-21T11:23:20+02:00\r\n"
time="2025-05-21T11:23:20+02:00" level=debug msg="Client sent: EHLO [192.168.1.10]"
time="2025-05-21T11:23:20+02:00" level=debug msg="Writing response to client: \n250-192.168.1.224 Hello\r\n250-SIZE 20971520\r\n250-PIPELINING\r\n250-ENHANCEDSTATUSCODES\r\n250 HELP\r\n"
time="2025-05-21T11:23:20+02:00" level=debug msg="Client sent: MAIL FROM:<[email protected]>"
time="2025-05-21T11:23:20+02:00" level=debug msg="Writing response to client: \n250 2.1.0 OK\r\n"
time="2025-05-21T11:23:20+02:00" level=debug msg="Client sent: RCPT TO:<[email protected]>"
time="2025-05-21T11:23:20+02:00" level=debug msg="Writing response to client: \n250 2.1.5 OK\r\n"
time="2025-05-21T11:23:20+02:00" level=debug msg="Client sent: RCPT TO:<[email protected]>"
time="2025-05-21T11:23:20+02:00" level=debug msg="Writing response to client: \n250 2.1.5 OK\r\n"
time="2025-05-21T11:23:20+02:00" level=debug msg="Client sent: RCPT TO:<[email protected]>"
time="2025-05-21T11:23:20+02:00" level=debug msg="Writing response to client: \n250 2.1.5 OK\r\n"
time="2025-05-21T11:23:20+02:00" level=debug msg="Client sent: RCPT TO:<[email protected]>"
time="2025-05-21T11:23:20+02:00" level=debug msg="Writing response to client: \n250 2.1.5 OK\r\n"
time="2025-05-21T11:23:20+02:00" level=debug msg="Client sent: DATA"
time="2025-05-21T11:23:24+02:00" level=debug msg="Writing response to client: \n354 Enter message, ending with '.' on a line by itself\r\n"
time="2025-05-21T11:23:33+02:00" level=info msg="Hash: d1515a4d02532c07d7b31a852916eb1d "
time="2025-05-21T11:23:40+02:00" level=info msg="Headers are:map[Cc:[[email protected], [email protected]] Content-Type:[multipart/mixed; boundary=\"=-j77npLw+HtpGSWV38xgH\"] Date:[Wed, 21 May 2025 11:23:20 +0200] From:[dev <[email protected]>] Message-Id:[<[email protected]>] Mime-Version:[1.0] Subject:[Test from SMTP to google bridge] To:[User <[email protected]>, ToUser <[email protected]>] User-Agent:[Evolution 3.52.3-0ubuntu1]]"
time="2025-05-21T11:23:40+02:00" level=debug msg="Writing response to client: \n250 2.0.0 OK: queued as d1515a4d02532c07d7b31a852916eb1d\r\n"
time="2025-05-21T11:23:40+02:00" level=debug msg="Client sent: QUIT"
time="2025-05-21T11:23:40+02:00" level=debug msg="Writing response to client: \n221 2.0.0 Bye\r\n"
This package depends on phires Go phires package.