My forms had been working fine until recently. At first, it seemed like they had stopped working completely, but after some testing, I noticed that they worked fine as long as the sender's email have the domain pleasantonusd.net, which is the domain for the Google Apps email system we are using. It doesn't matter what the jsmith@ part is, as long as the domain is pleasantonusd.net the email goes through.
I am hosting the site on a remote server. The WP general settings email and the server's admin email are both my private email account which doesn't have anything to do with pleasantonusd.net. The CIMY Swift SMTP plugin is set up for the server with the SMTP server address: mail.amadorvalleyhs.org, Port: 465, Username: firstname.lastname@example.org.
Since pleasantonusd does not seem to be in the picture in any of these variable, is there anywhere else where I may have inadvertently plugeed in some kind of formula or routing algorhythm? I've checked the form itself and I don't seem to see anything there. (Note: I do have the code you provided for automatically deteling entries in the functions.php file.)