When sending an email from Xena (an invoice, offer or alike) it is send by Xena on behalf of your personal or company’s email account. In the sender field of your emails, it will say: "firstname.lastname@example.org on behalf of [your_email@your_domain.com]." You may not want this information to be visible to the recipient, but without your help, Xena do not have any other options.
If you want to remove the "on behalf of" message and minimize the risk of your mails landing in the SPAM filter, you need to give Xena permission to send email from your domain. Technically speaking, this is done by creating DNS records on your domain. Xena can’t help with that, but your domain provider can to it for you (refer them to this page) or you can do it yourself if you have access to a DNS administration tool for your domain.
Notice: This guide only applies if you have your own domain. If you use service providers like Gmail and Hotmail you cannot remove the "on behalf of" message.
Add Xena’s partner for email distribution to your SPF record by adding "include:sendgrid.net". If you don’t have any other SPF records, make a new TXT record with the same name (“hostname”) as your domain and set the value for:
v=spf1 include:sendgrid.net ~all
If you already a SPF record, insert the "include:sendgrid.net" right before "~all", like this:
v=spf1 include:somedomain.com include:otherdomain.com include:sendgrid.net ~all
Next step is to create DKIM records. Add another TXT record with the following name ("hostname"):
Make sure to replace "yourdomain.com" with the domain name you are editing these DNS record.
Set the value of the DKIM record to:
k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDPtW5iwpXVPiH5FzJ7Nrl8USzuY9zqqzjE0D1r04xDN6qwziDnmgcFNNfMewVKN2D1O+2J9N14hRprzByFwfQW76yojh54Xu3uSbQ3JP0A7k8o8GutRF8zbFUA8n0ZH2y0cIEjMliXY4W4LwPA7m4q0ObmvSjhd63O9d8z1XkUBwIDAQAB
Usually DNS record works after a few hours.