Hi @manalyn ,   Thanks for raising this to us. if you have done all the troubleshooting available here ( Cannot Send Email Rejected by the Server/Banned from using SMTP )   Send us your account details (Username/Customer ID together with the e-mail address affected with the issue).   In case you need a reference: How do I private message (PM) in the community    I'll wait for your response, cheers!  ... View more