New Lines (\R\N) Are Not Working in Email Body

New lines (\r\n) are not working in email body

You need to use a <br> because your Content-Type is text/html.

It works without the Content-Type header because then your e-mail will be interpreted as plain text. If you really want to use \n you should use Content-Type: text/plain but then you'll lose any markup.

Also check out similar question here.

Newline showing up on screen but not in email

If your email is HTML formatted then that would affect presentation of newlines.

PHP break line .\n isn't working in email body. Lines are dissapearing

You are base64encoding the line endings aswell

So the actual output would not have \n\r
Try this:

$string .= $sender_name."\r\n";
$string .= $sender_number."\r\n";
$string .= $sender_message."\r\n";
$body .= base64_encode(chunk_split($string)); // I think since your transfer encoding is base64, it will not respect the line endings added by the chunk_split not sure tho so be sure to encode it all with base64

EDIT:
Given your code:

$body = $sender_name. "\n";
$body = $sender_number. "\n";
$body = $sender_message. "\n";

On each of these lines you are not appending the string but assigning it a new value; use .= instead of assignment operator

Some occurrence of \r\n not working in text email encoding in one of the test environments

Thanks for your solution @maxBilbow.

The issue was due to Outlook changing the format and ignoring some of the line changes and spaces it assumed unnecessary.

Adding 3 or more spaces at the start of each line fixed the issue.

replaced public String EOL = "\r\n"; with public String EOL = "\r\n ";

Insert a line break in mailto body

I would suggest you try the html tag <br>, in case your marketing application will recognize it.

I use %0D%0A. This should work as long as the email is HTML formatted.

<a href="mailto:email@mycompany.com?subject=Subscribe&body=Lastame%20%3A%0D%0AFirstname%20%3A"><img alt="Subscribe" class="center" height="50" src="subscribe.png" style="width: 137px; height: 50px; color: #4da6f7; font-size: 20px; display: block;" width="137"></a>

You will likely want to take out the %20 before Firstname, otherwise you will have a space as the first character on the next line.

A note, when I tested this with your code, it worked (along with some extra spacing). Are you using a mail client that doesn't allow HTML formatting?

Plain text email next line doesn't work even with \r\n

You need to specifically declare content type to html to use html statements

$message_string = "\r\n";
$message_string .= 'Content-Type: text/html; charset=ISO-8859-1"';
$message_string .= "\r\n";
$message_string .= $Message;

Now your break statements will take effect.

PHP new line break in emails

Try \r\n in place of \n

The difference between \n and \r\n

It should be noted that this is applicable to line returns in emails. For other scenarios, please refer to rokjarc's answer.

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