Send and receive email via IMAP/SMTP using curl. Works with any email provider. By default uses the agent's own inbox configured via KORTIX_AGENT_EMAIL_INBOX_* env vars, but can target any SMTP/IMAP server by passing credentials directly. Use when the agent needs to: send email, check inbox, read messages, reply, search, or manage flags.
What this skill does
# Email (IMAP/SMTP via curl) Send and receive email from the terminal. Just `curl`. Works with any provider — AgentMail, Gmail, Outlook, Fastmail, self-hosted, anything with IMAP/SMTP. By default uses the agent's own inbox (env vars below). Can also target any arbitrary SMTP/IMAP server by swapping the credentials. --- ## Default Credentials (agent's inbox) These env vars are pre-configured: ```bash USER="$KORTIX_AGENT_EMAIL_INBOX_USER_NAME" PASS="$KORTIX_AGENT_EMAIL_INBOX_PASSWORD" SMTP="smtps://$KORTIX_AGENT_EMAIL_INBOX_SMTP_HOST:$KORTIX_AGENT_EMAIL_INBOX_SMTP_PORT" IMAP="imaps://$KORTIX_AGENT_EMAIL_INBOX_IMAP_HOST:$KORTIX_AGENT_EMAIL_INBOX_IMAP_PORT" FROM="$KORTIX_AGENT_EMAIL_INBOX_FROM_NAME <$KORTIX_AGENT_EMAIL_INBOX_FROM_EMAIL>" EMAIL="$KORTIX_AGENT_EMAIL_INBOX_FROM_EMAIL" ``` To use a different mailbox, just swap those values. **Never print credentials.** --- ## Send ```bash TMPFILE=$(mktemp) cat > "$TMPFILE" <<EOF From: $FROM To: [email protected] Subject: Hello Date: $(date -R) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Your message body here. EOF curl -sS "$SMTP" --user "$USER:$PASS" \ --mail-from "$EMAIL" \ --mail-rcpt "[email protected]" \ --upload-file "$TMPFILE" rm -f "$TMPFILE" ``` Multiple recipients: add more `--mail-rcpt` flags. CC: add `Cc:` header in the file AND a `--mail-rcpt` per CC address. --- ## List Folders ```bash curl -sS "$IMAP/" --user "$USER:$PASS" | tr -d '\r' ``` --- ## Inbox Count ```bash curl -sS "$IMAP/INBOX" --user "$USER:$PASS" -X "EXAMINE INBOX" | tr -d '\r' ``` `* N EXISTS` = total messages. --- ## List Messages ```bash curl -sS "$IMAP/INBOX" --user "$USER:$PASS" \ -X "FETCH 1:* (FLAGS BODY.PEEK[HEADER.FIELDS (FROM SUBJECT DATE)])" | tr -d '\r' ``` --- ## Read a Message ```bash curl -sS "$IMAP/INBOX" --user "$USER:$PASS" \ -X "FETCH 3 BODY.PEEK[]" | tr -d '\r' ``` `BODY.PEEK[]` = read without marking seen. `BODY[]` = mark as read. --- ## Search ```bash curl -sS "$IMAP/INBOX" --user "$USER:$PASS" -X "SEARCH UNSEEN" | tr -d '\r' curl -sS "$IMAP/INBOX" --user "$USER:$PASS" -X 'SEARCH FROM "[email protected]"' | tr -d '\r' curl -sS "$IMAP/INBOX" --user "$USER:$PASS" -X 'SEARCH SUBJECT "meeting"' | tr -d '\r' curl -sS "$IMAP/INBOX" --user "$USER:$PASS" -X 'SEARCH SINCE 01-Jan-2026' | tr -d '\r' curl -sS "$IMAP/INBOX" --user "$USER:$PASS" -X 'SEARCH UNSEEN FROM "bob"' | tr -d '\r' ``` Returns `* SEARCH 1 4 7` — matching sequence numbers. --- ## Mark Read / Unread ```bash curl -sS "$IMAP/INBOX" --user "$USER:$PASS" -X 'STORE 3 +FLAGS (\Seen)' | tr -d '\r' curl -sS "$IMAP/INBOX" --user "$USER:$PASS" -X 'STORE 3 -FLAGS (\Seen)' | tr -d '\r' ``` --- ## Delete ```bash curl -sS "$IMAP/INBOX" --user "$USER:$PASS" -X 'STORE 3 +FLAGS (\Deleted)' | tr -d '\r' curl -sS "$IMAP/INBOX" --user "$USER:$PASS" -X 'EXPUNGE' | tr -d '\r' ``` --- ## Reply 1. FETCH original to get `From`, `Subject`, `Message-ID` 2. Compose reply with `In-Reply-To:` and `References:` set to original `Message-ID` 3. Prefix subject with `Re: ` 4. Send via SMTP as above --- ## Rules - **Act, don't ask.** Send/read when instructed. - **Never print credentials.** - **Human language.** Say "I sent the email" not "curl smtps://..." - **Always `tr -d '\r'`** on IMAP output. - **Identity:** when sending from the agent's own inbox, always use the configured FROM_NAME/FROM_EMAIL.
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