Filtering messages by Subject, Sender Email, Sender Name, Recipient Email and Recipient Name works using the similar algorithm. Here is an example of a filter by Subject.

Select Subject from the drop down menu to display the Subject Filter window.

String or Regular Expression - type a text or a regular expression that a message subject must contain. A regular expression is a string of characters which tells the searcher which string (or strings) you are looking for.

You can learn more about regular expressions here

Click Add. The specified text will be automatically appear in the table.

Field matches all of the words below - check this option if you want the program to find messages that contain ALL of the specified words/expressions in the Subject field. I.e. the filter by subject is executed on AND criteria.

Field matches any of the words below - check this option if you want the program to find messages that contain ANY of the specified words/expressions in the Subject field. I.e. the filter by subject is executed on OR criteria.

If you click the right mouse button on the selected string from the table, you will display the popup menu with the following options:

Match Case - select Yes if you want the program to recognize all the capital letters in your text. Otherwise the program will ignore capital letters.

Whole String - select Yes if you want the program to search for the subject that contains the exact text only. For example, you type subscribe and set Yes in the 'Whole string', the program will catch emails only with the subscribe word in the message subject. Emails with the unsubscribe word will be skipped. If you set No in the 'Whole srting', both subscribe and unsubscribe words are caught.

Contain Word - select Yes if you want the program to find the messages which contain the specified text in the Subject field. If you type No, the program will search for the messages that do not contain the specified text in the Subject.

Regular Expression - select Yes if the text you specified for searching is a regular expression.

To edit a selected string, click Edit.

To delete a selected string from the table, click Delete.

To select all strings in the table, click Select All.

The yellow field below the window will display you a full description of your settings.

Test Regular Expression window allows you to check if a message contain the specified regular expression, i.e. whether you correctly created a regular expression you want the program to search for in the specified text.

Type the regular expression in the appropriate window. Enter the text that this regular expression must match in the Source window and click Match. To find the next regular expression that matches the specified mask, click Match Next. The Result window will show you the searching results.

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