diff --git a/src/email.ts b/src/email.ts
index f8916d4..6ad05a0 100644
--- a/src/email.ts
+++ b/src/email.ts
@@ -4,24 +4,16 @@ import * as O from "fp-ts/lib/Option";
 import { createTransport } from "nodemailer";
 import { toError } from "fp-ts/lib/Either";
 import { pipe } from "fp-ts/lib/function";
-import {
-  ImapFlow,
-  type FetchMessageObject,
-  type FetchQueryObject,
-  type MailboxLockObject,
-} from "imapflow";
+import { ImapFlow, type FetchMessageObject, type FetchQueryObject, type MailboxLockObject } from "imapflow";
 import * as IO from "fp-ts/lib/IO";
 import * as T from "fp-ts/lib/Task";
-import { ConsoleLogger } from "./logger";
+import { ConsoleLogger, type Logger } from "./logger";
 
 interface ImapClientI {
-  fetchAll: (
-    range: string,
-    options: FetchQueryObject,
-  ) => Promise<FetchMessageObject[]>;
+  fetchAll: (range: string, options: FetchQueryObject) => Promise<FetchMessageObject[]>;
   connect: () => Promise<void>;
   getMailboxLock: (mailbox: string) => Promise<MailboxLockObject>;
-  messageDelete: (uids: number[], opts: any) => Promise<boolean>;
+  messageDelete: (uids: number[], opts: Record<string, any>) => Promise<boolean>;
   close: () => void;
 }
 
@@ -40,10 +32,7 @@ class ErrorWithLock extends Error {
   }
 }
 const ToErrorWithLock = (lock?: MailboxLockObject) => (error: unknown) =>
-  new ErrorWithLock(
-    error instanceof Error ? error.message : "Unknown error",
-    lock,
-  );
+  new ErrorWithLock(error instanceof Error ? error.message : "Unknown error", lock);
 
 /**
  * Generate a unique email.
@@ -51,42 +40,31 @@ const ToErrorWithLock = (lock?: MailboxLockObject) => (error: unknown) =>
  * @param to is the email to send to.
  * @returns an {@link Email}.
  */
-type EmailGenerator = (
-  from: EmailFromInstruction,
-  to: EmailToInstruction,
-) => IO.IO<Email>;
-const generateEmail: EmailGenerator =
-  (from: EmailFromInstruction, to: EmailToInstruction) => () => ({
-    from: from.email,
-    to: to.email,
-    subject: [new Date().toISOString(), crypto.randomUUID()].join(" | "),
-    text: crypto.randomUUID(),
-  });
+type EmailGenerator = (from: EmailFromInstruction, to: EmailToInstruction) => IO.IO<Email>;
+const generateEmail: EmailGenerator = (from: EmailFromInstruction, to: EmailToInstruction) => () => ({
+  from: from.email,
+  to: to.email,
+  subject: [new Date().toISOString(), crypto.randomUUID()].join(" | "),
+  text: crypto.randomUUID()
+});
 
 /**
  * Get the transport layer for a mailbox to send a piece of mail.
  * @param param0 is the mailbox to send from.
  * @returns a function that takes an email and sends it.
  */
-type GetSendEmail = (
-  from: EmailFromInstruction,
-) => (email: Email) => TE.TaskEither<Error, Email>;
-const getSendTransport: GetSendEmail = ({
-  username,
-  password,
-  server,
-  send_port,
-}) => {
+type GetSendEmail = (from: EmailFromInstruction) => (email: Email) => TE.TaskEither<Error, Email>;
+const getSendTransport: GetSendEmail = ({ username, password, server, send_port }) => {
   const transport = createTransport({
     host: server,
     port: send_port,
     auth: {
       user: username,
-      pass: password,
+      pass: password
     },
     tls: {
-      rejectUnauthorized: false,
-    },
+      rejectUnauthorized: false
+    }
   });
   return (email: Email) =>
     TE.tryCatch(
@@ -98,9 +76,9 @@ const getSendTransport: GetSendEmail = ({
             } else {
               resolve(email);
             }
-          }),
+          })
         ),
-      toError,
+      toError
     );
 };
 
@@ -109,9 +87,7 @@ const getSendTransport: GetSendEmail = ({
  * @param param0 is the mailbox to read from.
  * @returns a Right({@link ImapFlow}) if it connected, else an Left(error).
  */
-type GetImapClient = (
-  to: EmailToInstruction,
-) => TE.TaskEither<Error, ImapClientI>;
+type GetImapClient = (to: EmailToInstruction) => TE.TaskEither<Error, ImapClientI>;
 const getImap: GetImapClient = ({ username, password, server, read_port }) => {
   const imap = new ImapFlow({
     logger: false,
@@ -120,8 +96,8 @@ const getImap: GetImapClient = ({ username, password, server, read_port }) => {
     secure: true,
     auth: {
       user: username,
-      pass: password,
-    },
+      pass: password
+    }
   });
   return TE.tryCatch(() => imap.connect().then(() => imap), toError);
 };
@@ -130,18 +106,16 @@ const getImap: GetImapClient = ({ username, password, server, read_port }) => {
  * @param imap is the Imap client to fetch messages from.
  * @returns a Right({@link FetchMessageObject}[]) if successful, else a Left(error).
  */
-const fetchMessages = (
-  imap: ImapClientI,
-): TE.TaskEither<Error, FetchMessageObject[]> =>
+const fetchMessages = (imap: ImapClientI): TE.TaskEither<Error, FetchMessageObject[]> =>
   TE.tryCatch(
     () =>
       imap.fetchAll("*", {
         uid: true,
         envelope: true,
         headers: true,
-        bodyParts: ["text"],
+        bodyParts: ["text"]
       }),
-    toError,
+    toError
   );
 
 /**
@@ -152,8 +126,7 @@ const fetchMessages = (
 type EmailMatcher = (email: Email) => (message: FetchMessageObject) => boolean;
 const matchesEmail: EmailMatcher = (email) => (message) => {
   const subjectMatches = email.subject === message.envelope.subject;
-  const bodyMatches =
-    message.bodyParts.get("text")?.toString().trim() === email.text.trim();
+  const bodyMatches = message.bodyParts.get("text")?.toString().trim() === email.text.trim();
   const headers = message.headers.toLocaleString();
   const fromMatches = headers.includes(`Return-Path: <${email.from}>`);
   const toMatches = headers.includes(`Delivered-To: ${email.to}`);
@@ -173,13 +146,9 @@ type FindEmailUidInInbox = (
   equalsEmail: (message: FetchMessageObject) => boolean,
   retries: number,
   pollIntervalMs: number,
+  logger?: Logger,
 ) => TE.TaskEither<Error, number>;
-const findEmailUidInInbox: FindEmailUidInInbox = (
-  imap,
-  equalsEmail,
-  retries,
-  pollIntervalMs,
-) =>
+const findEmailUidInInbox: FindEmailUidInInbox = (imap, equalsEmail, retries, pollIntervalMs, logger = ConsoleLogger) =>
   pipe(
     fetchMessages(imap),
     TE.flatMap((messages) => {
@@ -192,20 +161,17 @@ const findEmailUidInInbox: FindEmailUidInInbox = (
     TE.fold(
       (e) =>
         pipe(
-          TE.fromIO(
-            ConsoleLogger.log(`failed to find email; ${retries} retries left.`),
-          ),
-          TE.chain(() =>
-            retries === 0
-              ? TE.left(e)
-              : T.delay(pollIntervalMs)(TE.right(null)),
-          ),
-          TE.chain(() =>
-            findEmailUidInInbox(imap, equalsEmail, retries - 1, pollIntervalMs),
-          ),
+          TE.fromIO(logger.log(`failed to find email; ${retries} retries left.`)),
+          TE.chain(() => (retries === 0 ? TE.left(e) : T.delay(pollIntervalMs)(TE.right(null)))),
+          TE.chain(() => findEmailUidInInbox(imap, equalsEmail, retries - 1, pollIntervalMs))
         ),
-      TE.of,
-    ),
+      (s) =>
+        pipe(
+          s,
+          TE.of,
+          TE.tap(() => TE.fromIO(logger.log("Email succeeded")))
+        )
+    )
   );
 
 export type EmailJobDependencies = {
@@ -227,32 +193,23 @@ export const perform = (
     getSendImpl = getSendTransport,
     getImapImpl = getImap,
     findEmailUidInInboxImpl = findEmailUidInInbox,
-    matchesEmailImpl = matchesEmail,
-  }: Partial<EmailJobDependencies> = {},
+    matchesEmailImpl = matchesEmail
+  }: Partial<EmailJobDependencies> = {}
 ): TE.TaskEither<Error, boolean> =>
   pipe(
     // arrange.
     TE.fromIO(generateEmailImpl(from, to)),
     TE.bindTo("email"),
     // act.
-    TE.tap(({ email }) =>
-      pipe(getSendImpl(from)(email), TE.mapLeft(ToErrorWithLock())),
-    ),
+    TE.tap(({ email }) => pipe(getSendImpl(from)(email), TE.mapLeft(ToErrorWithLock()))),
     TE.bind("imap", () => pipe(getImapImpl(to), TE.mapLeft(ToErrorWithLock()))),
-    TE.bind("mailboxLock", ({ imap }) =>
-      TE.tryCatch(() => imap.getMailboxLock("INBOX"), ToErrorWithLock()),
-    ),
+    TE.bind("mailboxLock", ({ imap }) => TE.tryCatch(() => imap.getMailboxLock("INBOX"), ToErrorWithLock())),
     // "assert".
     TE.bind("uid", ({ imap, email, mailboxLock }) =>
       pipe(
-        findEmailUidInInboxImpl(
-          imap,
-          matchesEmailImpl(email),
-          retries,
-          interval,
-        ),
-        TE.mapLeft(ToErrorWithLock(mailboxLock)),
-      ),
+        findEmailUidInInboxImpl(imap, matchesEmailImpl(email), retries, interval),
+        TE.mapLeft(ToErrorWithLock(mailboxLock))
+      )
     ),
     // cleanup.
     TE.bind("deleted", ({ imap, uid, mailboxLock }) =>
@@ -271,6 +228,6 @@ export const perform = (
       ({ mailboxLock, deleted }) => {
         mailboxLock.release();
         return TE.right(deleted);
-      },
-    ),
+      }
+    )
   );