On November 14, 2019 8:17:14 PM CST, Cynthia Meystel wrote:
>I've been using K-9 for years without a problem. I'm presently using it
>on
>a Samsung Galaxy S9+ and all was fine until today when all emails sent
>with
>wifi on failed to send (error message was failed to connect to SMTP). I
>can
>open web pages without a problem and if I turn wifi off I can send the
>emails over 4G. I have made no changes to any settings. I am running
>the
>most recent version of K-9. I have double checked my SMTP settings and
>they
>are correct.I can send emails from Samsung's email app or from the
>Gmail
>app over wifi without a problem.
>
>Any idea how to fix this or do I need to switch to a different app to
>be
>able send email over wifi now?
A number of end-user ISPs block outbound connections to port 25 for spam
prevention. Is your SMTP config using port 25? If so, I would suggest switching
it to the submission port 587.
--Sean
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