The test with Live Mail shows the recipients' addresses are valid. Good but it also demonstrates a possibility that K9 is setup differently.
A first thought is that K9's SMTP settings for KolabNow.com is really setup correctly. A common cause is forgetting to set the authentication correctly. Kolab's site defines (Smtp is same for both IMAP and POP usa) *SMTP* server is smtp.kolabnow.com*Port/Security is* 587 + STARTTLS*Authentication: use *Password <your-email-password> with *Username <your-email-id@* kolabnow.com> Pete On Saturday, 18 August 2018 02:36:25 UTC+2, Magnum357 wrote: > > I've got a Verizon Kyocera E6810, running Android 7.1.2. I'm using K-9 > Mail v. 5.403; my email server is KolabNow.com. I just got this phone last > month, and have had this problem since day one. > > While the account settings for Sending Mail match what KolabNow lists for > the K-9 app, and the verification process works, I am not able to send new > messages or reply to received messages. I get an Android message - "Failed > to send some messages. Error: no valid recipients". > > No problem sending the same email messages to the same addresses from my > laptop using LiveMail. > > Any help would be greatly appreciated! > > -357- > > -- You received this message because you are subscribed to the Google Groups "K-9 Mail" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
