I am having the same issue....any help would be appreciated.
Hi All,
I have downloaded and installed K-9 mail (I grew tired of the regular email app notifying me at 3 AM that there is a sale at JCPenney. I tried changing it to never check but it kept changing it back so I dumped it). K-9 mail installed went great except I can not send email. When it tries to connect to the outgoing server it says it can not connect. I have verified the SMTP settings, the user ID and password. I can not see anything wrong. Incoming is fine. Anyone else having an issue with outgoing? My next step is to contact the K-9 developers.
This is almost always the port selection and security setting. Instead of port 25, try 587 or 465 and set TLS as "Always' or "If Available". If those settings don't work, do a google search for you ISP and "port settings".
Good luck.
Not only that, but definitely check with your Mail Provider for specifics on how you are to connect to the server. In some cases, they may want you to authenticate to prove you are the user authorized to connect to their SMTP server.
As mentioned before though, there is also a likely chance you are being blocked due to being on a foreign IP address and it is one of their protections to prevent SMTP Spam Relay attacks that spammers and hackers love to use on Open SMTP relay servers.