aerogramme.deuxfleurs.fr/content/documentation/development/netcat.md

+++
title = "Debug with netcat"
weight = 10
+++

In this document, we collected some traces from netcat
that could help you quickly test/debug Aerogramme.

Start with:

```
nc localhost 143
```

## Login

```
S: * OK Hello
C: A1 LOGIN alan p455w0rd
S: A1 OK Completed
```

## Select mailbox

```
C: A2 SELECT INBOX
S: * 0 EXISTS
S: * 0 RECENT
S: * FLAGS (\Seen \Answered \Flagged \Deleted \Draft)
S: * OK [PERMANENTFLAGS (\Seen \Answered \Flagged \Deleted \Draft \*)] Flags permitted
S: * OK [UIDVALIDITY 1] UIDs valid
S: * OK [UIDNEXT 1] Predict next UID
S: A2 OK [READ-WRITE] Select completed
```

## Check for new mails

Here we simply use the `NOOP` command to trigger an interaction with the server.

```
C: A4 NOOP
S: * 1 EXISTS
S: A4 OK NOOP completed.
```

## See mail structure

```
C: A5 FETCH 1 FULL
S: * 1 FETCH (UID 1 FLAGS () INTERNALDATE "06-Jul-2022 14:46:42 +0000" 
      RFC822.SIZE 117 ENVELOPE (NIL "test" (("Alan Smith" NIL "alan" "smith.me")) 
      NIL NIL (("Alan Smith" NIL "alan" "aerogramme.tld")) NIL NIL NIL NIL) 
      BODY ("TEXT" "test" NIL "test" "test" "test" 1 1))
```

## See mail content

```
C: A6 FETCH 1 (RFC822)
S: * 1 FETCH (UID 1 RFC822 {117}
S: Subject: test
S: From: Alan Smith <alan@smith.me>
S: To: Alan Smith <alan@aerogramme.tld>
S: 
S: Hello, world!
S: .
S: )
S: A6 OK FETCH completed
```

## Disconnect

```
C: A7 LOGOUT
S: * BYE Logging out
S: A7 OK Logout completed
```

## Full trace

An IMAP trace extracted from Aerogramme:

```
S: * OK Hello
C: A1 LOGIN alan p455w0rd
S: A1 OK Completed
C: A2 SELECT INBOX
S: * 0 EXISTS
S: * 0 RECENT
S: * FLAGS (\Seen \Answered \Flagged \Deleted \Draft)
S: * OK [PERMANENTFLAGS (\Seen \Answered \Flagged \Deleted \Draft \*)] Flags permitted
S: * OK [UIDVALIDITY 1] UIDs valid
S: * OK [UIDNEXT 1] Predict next UID
S: A2 OK [READ-WRITE] Select completed
C: A3 NOOP
S: A3 OK NOOP completed.
        <---- e-mail arrives through LMTP server ---->
C: A4 NOOP
S: * 1 EXISTS
S: A4 OK NOOP completed.
C: A5 FETCH 1 FULL
S: * 1 FETCH (UID 1 FLAGS () INTERNALDATE "06-Jul-2022 14:46:42 +0000" 
      RFC822.SIZE 117 ENVELOPE (NIL "test" (("Alan Smith" NIL "alan" "smith.me")) 
      NIL NIL (("Alan Smith" NIL "alan" "aerogramme.tld")) NIL NIL NIL NIL) 
      BODY ("TEXT" "test" NIL "test" "test" "test" 1 1))
S: A5 OK FETCH completed
C: A6 FETCH 1 (RFC822)
S: * 1 FETCH (UID 1 RFC822 {117}
S: Subject: test
S: From: Alan Smith <alan@smith.me>
S: To: Alan Smith <alan@aerogramme.tld>
S: 
S: Hello, world!
S: .
S: )
S: A6 OK FETCH completed
C: A7 LOGOUT
S: * BYE Logging out
S: A7 OK Logout completed
```