Viruses

If we detect a virus in an email that's been sent, the message will be returned to the sender. If you've sent an email and it's been returned, try checking your computer for viruses before resending it.

Note: Safeguard your computer with virus prevention. You can install virus protection software from our Security & Resolution center.

Too large

Messages are limited to 2MB in size. If you're trying to send a large email, try reducing the size of the message. eBay Messages won't let you attach or download files, but you can send links to listings, photos, and descriptions.

Too many messages

The number of messages that can be sent over a weekly period is limited. This protects email accounts from unwanted messages (spam).

Full mailbox

If a member's mailbox is full, the message you sent will be returned to you. Try again in a few hours.

Blank subject line

You must fill in the subject line of the message in order for it to be sent.

Invalid or expired item

If you're sending a message to your buyer or seller about a transaction, make sure that the item number is correct and that the item hasn't expired. If you use an incorrect item number or the number of an item that is more than 90 days old from the end of the listing, your message won't go through.

Encryption

Emails that are encrypted before they are sent (or are automatically encrypted when sent) will not be delivered through eBay Messages. Encryption is a way of scrambling or coding information before it's sent, and then decoding the same information when it's received. If you're using encryption software, you may need to turn it off before sending messages.

Active content

Messages that launch streaming videos, Flash, animated clips, or have JavaScript may not be delivered. Because of the risk of viruses or malicious programs, we block active content. You're always able to send links to listings and other areas of eBay.

Attachments

You can't view or download attached files. You also can't attach files to the emails you send through Messages.