Sometimes, you may notice that emails that you try to send through SalesHandy fail for a reason: "SMTP: data not accepted". Below are the possible reasons behind why it happens.

Some servers require that the From email address is the same as the email address used to authenticate. Check the from name and match it to the username you use to log in to your SMTP server.

Some servers reject a message if the body is too large. HTML emails, in general, are bigger than normal text messages, but it's recommended to decrease the size by removing some content or by disabling embedded images.

We don't send your emails using our servers, but we initiate the emails from our servers, and those email requests are sent to your email provider's servers and then sent to the recipient's address from your email provider. We use a few IP addresses to send email requests to the sender's email providers and those IPs might be blacklisted by your email provider therefore, emails may get failed due to this reason. In this case, you must contact your email provider and get our IPs whitelisted.

Sometimes, the email server responds with this error if some limits have been reached or you’re sending “too fast.” Please pause your campaigns for a while and try again later. If you are sending via Amazon SES, you must have verified the from, reply-to, and bounce address you are using in your mailings.

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