E-mail sent from Shared Hosting web server passes through filter and headers are logged for security and deliverability tracking (see Sending e-mail trough web-server).
Owner of the server and users with delegatons can access last 7 days of the log in server management under Logs -> Webserver e-mail. Log can be used to answer questions like::
- has the web application tried to send a particular email?
 - has the sending of email been blocked (exceeding limits or triggering spam filter)
 - could the server be sending unsolicited email (malware or unprotected web forms)
 

Log file can be downloaded as .json file with additional fields.
Explanation of main fields:
passed– did e-mail pass the filter? (N means blocking due to exceeding limits or triggering spam detection)header_from– sender’s address (envelope_from is available in .json)rcpt– actual recipient (includes bcc: addresses; header_to is available .json)php script– script that sent the email (available only if PHP mail() was used – missing if a library used another method)