If you see an error message when sending your gallery mails from picdrop, it may be that you have hit one of our spam protection mail limits.
A brief explanation:
We've set up mail-limits for sending emails via picdrop to prevent the emails from ending up in your customers' spam folders. This is because sending masses of emails can quickly lead to the email program marking the picdrop emails as spam and all following emails also end up in the spam folder. We and you certainly want to avoid this as much as possible.
However, if you reach one of these limits, you are welcome to contact us at any time and we will temporarily increase the limits for you. Just send a short email to hello@picdrop.com.