Email not delivered or returned ('Undeliverable')

Getting an 'Undeliverable' or 'Undelivered Mail Returned to Sender' message, does your email end up in the recipient's spam, or doesn't it arrive? Look up below what you see.

You get 'Undeliverable' or 'Undelivered Mail Returned to Sender'

The email was returned by the recipient's server. The message says why. Open the message and look for the reason:

• 'User unknown', 'Address not found' or 'does not exist': the email address doesn't exist. Check the address on the contact card for typos.
• 'Mailbox full' or 'Quota exceeded': the recipient's mailbox is full. Try again later or get in touch another way.
• 'SPF', 'DKIM', 'rejected', 'spam' or 'policy': the recipient's server doesn't trust the sender. Set up SPF and DKIM for your domain. Read how: Setting up SPF and DKIM for your domain

Your email ends up in the recipient's spam

Usually this is because SPF or DKIM isn't set up properly. The recipient's server then can't check whether the email really comes from you. Set up both: Setting up SPF and DKIM for your domain

You get an SPF message with a mass mailing

Without a valid SPF record, you can send a maximum of 100 emails per month with mass mailings. If you select more contacts, you get a message. Set up SPF to be able to send more. Read more: Sending a mass mailing

Your email arrives late

Read: Email arrives late

Can't figure it out?

Forward the full error message to support@spinoffice-crm.com. Forward it as an attachment, so we can see all the technical details.