davmerit

To change the size of the font in CF7 you would need to edit the CSS style sheets used by your WordPress theme.

See Styling Contact Form for a general explanation of styling CF7 forms using CSS.

There is a link at the bottom of the page to a comprehensive and detailed article on Styling Contact Form 7 Forms. The article shows people, with suitable HTML & CSS skills, how to change the appearance of their Contact Form 7 Forms to meet their particular requirements.

The code below should change the font size of <p> [checkbox* opt-in default:1 "Subscribe to our newsletter & offers"] </p>
​

.wpcf7-form .wpcf7-list-item-label {
    font-size: 12px;
}

Please include a link to your Contact Form 7 form. If others here are able to understand your actual problem, they may be able and willing to offer a possible solution.

See How to add CF7 tracking to UA
and Tracking form with google analytics

This thread could also be of help​​

Great! But I am more interested in your mail section. Please provide me with the tags in the MAIL SECTION.

Styling of Upload / Add File is largely contolled by the selected browser unless you use Javascript to override this – see style file input type

@ibrarhussainbest
The green Success message and not receiving any error messages is a very clear indication that CF7 is sending the email.

So your email is probably being seen as spam somewhere in the email process. This is usually due to email headers (in particular the From email address used) or email content.

You may provide me with all the tags in the mail section of your form for me to inspect and provide you with support.

See Contact Form 7 Email Issues – this links to a much more comprehensive article which also covers emails being considered spam.

See also Best Practice to Set Up Mail.

Please include a link to your Contact Form 7 form plus all your input in the Form and Mail sections of the CF7 interface. If others here are able to understand your actual problem, they may be able to offer a possible solution.

🙂 – sorry for the first reply.

You may use Firebug or Chrome Dev Tools to examine the CSS used for the confirmation elements.

Altenatively you can see the CSS the CF7 plugin uses for confirmation message elements at Default CF7 CSS style.

You could change the font color by
​

div.wpcf7-response-output {
// change your color here​
    color: #398f14; 

}