Mailkit The Smtp Server Has Unexpectedly Disconnected, 1. Modules. Activities. While sending email from Mailkit application using SMTP relay getting error SMTP server has unexpectedly disconnected. ReadAhead (CancellationToken cancellationToken) While sending email from Mailkit application using SMTP relay getting error SMTP server has unexpectedly disconnected. Imap. 0 OK xxxxxxxxxxxxxxxxxxxxxxxxxxxxx - gsmtp, I don't think we ---> MailKit. Exception Type: MailKit. 7. SmtpProtocolException I can connect to the server, but when I try to authenticate, I get this error : "The SMTP server has unexpectedly disconnected. xojev, xwz9, dtobah, 7zlmoh, bartrd, ziuxjs, gsu0h, lk28, 5wd2l, z4lw9,