Formmail not sending to POP3 accounts

[topher79]

I'm working with a PHP formmail that is set up correctly and is sending to yahoo acconts and other webmail account just fine, but when I put in pop email accounts for my client, either they don't receive the email from the form at all or there's a 4 hour delay before they do. Obviously the form works, since it sends to my yahoo account, but I can't figure out where the delay is with POP3 accounts.

[felgall]

Any delays in delivery would be due to slow mailservers in the path that the email follows to its destination and is outside anyone's control. It is just a coincidence as to which mail is faster and which is slower for delivery.

Non-delivery is probably due to a spam filter either on the mail server or on the client computer misidentifying the email as spam. To fix this you would need to whitelist the sending address in the spam filter.