php error codes - has anyone come aross this?

Here is the error I get from my page:

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/jollywor/public_html/zencart/includes/classes/class.smtp.php:2114) in /home/jollywor/public_html/zencart/includes/functions/sessions.php on line 215

Warning: Cannot modify header information - headers already sent by (output started at /home/jollywor/public_html/zencart/includes/classes/class.smtp.php:2114) in /home/jollywor/public_html/zencart/includes/init_includes/init_templates.php on line 155

I had recently moved servers and I get this error.

Searching the FAQ system for "headers already sent" brings up this as the first result:
https://www.zen-cart.com/tutorials/index.php?article=87

I suspect that your class.smtp.php file is incomplete or corrupt and should be re-uploaded ... probably from the original copy.
If you find that it's double-spaced on the server, you should grab the original from the Zen Cart master distribution zip file, and upload that instead ... assuming you've not customized yours in some way.

Thanks, I'll give it a go.

I have did what you asked and it gave me three other errors, but I repeated the process with the different errors, and it worked. Thanks.

I guess some of the files were corrupt in the transfer.