Are all address books the same? Of course, they are not. This article is to help you understand the TrulyMail address book.
Now, most electronic address books are quite similar. No matter which application you use (TrulyMail, Outlook, Thunderbird, etc.) all of the address books allow you to sort by the various columns. Simply click the column header where it says 'Name' and you will see all of your contacts listed in order of their name. You can see the sort order because the sorted column (in this case 'Name') will have a little triangle on it.
Most address books also allow you to filter your lists. For example, in the TrulyMail address book, just type into the Filter text box and you'll only see your contacts which match what you typed. When finding matches, TrulyMail will look at the contact's name, address (for email contacts), and tags.

You might notice there is an extra column in your TrulyMail address book which many address books do not include: Tags.
Tags are labels or identifiers you can add to your contacts. For example, perhaps you like to email your family members regular updates on your life. You could tag each family member 'Family' and then when you are creating a new message, simply type 'Family' and you will only see those contacts which match. This can be very useful when you have hundreds of contacts. A contact can have multiple tags so this is the ideal way to include people in groups. With TrulyMail, you can see what groups someone is in and who are the members of a group. Try doing that with Thunderbird (Thunderbird only allows you to see the members of groups but you cannot see all the groups for one contact)!
TrulyMail allows blocking contacts (so they cannot send you messages). You can block both TrulyMail contacts and email contacts. If you block a TrulyMail contact, the server will not even accept their messages to you. If you block an email contact, their message will be automatically deleted before you see it. Either way, the result is the same - blocked contacts will never bother you. Of course, it is possible to change your mind. Perhaps you block someone and later decide you do not want that person to be blocked. To resolve this issue, just click on the Blocked Contacts tab (yes, your filter applies here too so it is easy to find someone even if you have many blocked contacts) and you can easily unblock those contacts you want to receive messages from.
You can also see a column titled 'Remote Images.' We have written articles before about remote images being used to track you. This is a complex issue but that does not mean you should not have control. The short version is that TrulyMail can either load remote images when displaying messages to you or not. This is configurable by you and you can configure it by contact. For example, perhaps you get a newsletter from support@TrulyMail.com and you know that when they do use remote images, they NEVER use them to track you (we never track you). You can configure that email address to allow remote images (Remote Images = True). This way, you will not have to click one more button when viewing emails from trusted sources.
Receive Only is another feature that other applications do not support (we have no idea why as we find it quite useful). The issue is that there are contacts you want in your address book (so you can configure return receipt settings, remote image settings, etc.) but you never want them to show up in your list of contacts when you are writing a message. For example, if you use Google Alerts, then you receive messages from googlealerts-noreply@google.com. You may want to make sure you never send a return receipt to this address but that does not mean you want to see this email address as a contact when you are writing new messages. The solution is to mark this contact as Receive Only then they will only show up in your address book and not in your contact list when composing a message.
Req Receipt is 'true' when you want to always request a return receipt from this person (that is, you want to be notified when the person reads your message so you know they got it). This is not an issue for TrulyMail contacts as TrulyMail always requests, and automatically processes, return receipts from TrulyMail users. However, for email contacts, this is important. For example, perhaps you have an understanding with a business contact that because emails are frequently never delivered (one of the major problems with email), you will both send messages with return receipts requested and you will always send the receipt back for messages you received. This way, you know what has been delivered and what has not been. While you could manually do this every time you write a message to that person, it is much easier to simply mark that contact Req Receipt=True and let TrulyMail do the work for you.
You can also mark Send Receipt=Always if you want TrulyMail to automatically send a return receipt to this contact when they send you an email message with a return receipt requested. If you mark Send Receipt=Never then even if that contact requests a return receipt, TrulyMail will not send one and will not ask you. You can also set Send Receipt=Use receiving account settings which means that TrulyMail will consider the the settings in the email account used to receive the message. TrulyMail gives you control at both a high and low level so you can choose what is right for you.

We are constantly trying to make TrulyMail easier to use for you so please feel free to send us your comments on how you use TrulyMail and which features you would like to see added or changed. After all, we are here to serve you.