fix a little error

Email, use a custom domain.

README.md

@@ -144,7 +144,7 @@ The big companies providing "free" email service, don't have a good reputation f
 **Use Smart Key** | Advanced | OpenPGP also [does not support](https://www.eff.org/deeplinks/2013/08/pushing-perfect-forward-secrecy-important-web-privacy-protection) Forward secrecy, which means if either your or the recipient's private key is ever stolen, all previous messages encrypted with it will be exposed. Therefore, you should take great care to keep your private keys safe. One method of doing so, is to use a USB Smart Key to sign or decrypt messages, allowing you to do so without your private key leaving the USB device.  Devices which support this include [NitroKey](https://www.nitrokey.com/), [YubiKey 5](https://www.yubico.com/products/yubikey-5-overview/) (See [Yubico Neo](https://developers.yubico.com/ykneo-openpgp/)), [Smart Card](https://www.floss-shop.de/en/security-privacy/smartcards/13/openpgp-smart-card-v3.3) (See [guide](https://spin.atomicobject.com/2014/02/09/gnupg-openpgp-smartcard/)), [OnlyKey](https://onlykey.io/)
 **Use Aliasing / Anonymous Forwarding** | Advanced | Email aliasing allows messages to be sent to [anything]@my-domain.com and still land in your primary inbox. Effectively allowing you to use a different, unique email address for each service you sign up for. This means if you start receiving spam, you can block that alias and determine which company leaked your email address. More importantly, you do not need to reveal your real email address to any company. <br>[Anonaddy](https://anonaddy.com) and [SimpleLogin](https://simplelogin.io/?slref=bridsqrgvrnavso) are open source anonymous email forwarding service allowing you to create unlimited email aliases, with a free plan
 **Subaddressing** | Optional | An alternative to aliasing is [subaddressing](https://en.wikipedia.org/wiki/Email_address#Subaddressing), where anything after the `+` symbol is omitted during mail delivery, for example you the address yourname+tag@example.com denotes the same delivery address as yourname@example.com. This was defined in [RCF-5233](https://tools.ietf.org/html/rfc5233), and supported by most major mail providers (inc Gmail, YahooMail, Outlook, FastMail and ProtonMail). It enables you to keep track of who shared/ leaked your email address, but unlike aliasing it will not protect against your real address being revealed
-**Use a Custom Domain** | Advanced | Using a custom domain, means that even you are not dependent on the address assigned my your mail provider. So you can easily switch providers in the future and do not need to worry about a service being discontinued
+**Use a Custom Domain** | Advanced | Using a custom domain, means that even you are not dependent on the address assigned by your mail provider. So you can easily switch providers in the future and do not need to worry about a service being discontinued
 **Sync with a client for backup** | Advanced | Further to the above, to avoid loosing temporary or permanent access to your emails during an unplanned event (such as an outage or account lock). Thunderbird can sync/ backup messages from multiple accounts via IMAP and store locally on your primary device
 **Be Careful with Mail Signatures** | Advanced | You do not know how secure of an email environment the recipient of your message may have. There are several extensions (such as [ZoomInfo](https://www.zoominfo.com)) that automatically crawl messages, and create a detailed database of contact information based upon email signitures, and sometimes message content. If you send an email to someone who has something like this enabled, then you are unknowingly entering your details into this database
 **Be Careful with Auto-Replies** | Advanced | Out-of-office automatic replies are very useful for informing people there will be a delay in replying, but all too often people reveal too much information- which can be used in social engineering and targeted attacks