I am unable to send emails in mail app since upgrading to IOS 12

Try re-entering the username and password in the Settings - Accounts & Passwords.

For your info, I tried to connect to smtp.eclipse.co.uk over port 25 (that's the default SMTP port) but I kept getting disconnected. Perhaps the problem is on the (Eclipse) server side.

Had same issue try this (you will require your apple ID & passwor later...)

settings> General> Reset> Reset all settings ... yes!

it will reset your device and reload/boot your iPhone or iPad

then your emails should work.

mikereed2011 wrote:

The ssl in relation to Port 25 - smtp.eclipse.co.uk had been turned on I assume when updating and this was causing the problem.

Great that you've fixed the problem. However, your outgoing mail server setting isn't secure. I don't know if your mail provider offer secure (SSL/TLS) SMTP connection. If they do, you should use it. The only way to find out is to contact Eclipse support.

What happens when you send out an email? Note: do not tell us "it does not work".

Who is your email provider? Were you able to send out email before the upgrade?