Windows 10
1.1.4
Bug?
No
Microsoft Outlook
This is the error log
_----------IMAP----------
----------SMTP----------
mailsmtp Last Error Code: 25
mailsmtp Last Error Location: 1_
I have masked my email for privacy

Same issue, arch 4.15.7-1, Mailspring 1.1.4.
Equivalent error log.
Other IMAP account connected succesfully.
Same here, Win 10, Mailspring 1.1.5.
Find my error log here.
(I also have the same issue on a linux box running kde neon.)
I'm receiving the same error on my end.
Version 1.1.5, Ubuntu 17.10 x64
Happening here too.
Manjaro Linux
Kernel 4.17
I'm also seeing this error.
The are also duplicate errors now: #788 #748
I have used this guide to set up Outlook.com in Mailspring manually (i.e. as a generic IMAP account): https://www.lifewire.com/access-outlook-in-thunderbird-3572532 (yes, it's written for Thunderbird but you can set the same numbers in Mailspring :) )
I also suspect that the automatic setup tries to use the wrong port.
I'm not sure if the Office 365 option is meant for your outlook.com email. Office 365 is a subscription service from Microsoft. However, as the above post says, you can manually enter the IMAP/SMTP settings, but, I suggest logging into your outlook.com and grabbing the information direct from Microsoft.
For reference, here are the values:
IMAP setting
Server name: outlook.office365.com
Port: 993
Encryption method: TLS
SMTP setting
Server name: smtp.office365.com
Port: 587
Encryption method: STARTTLS
same issue,
kernel: 4.16.5, OS: Antergos, mailspring: 1.2.1-7e...
for *@hotmail.com it fails. However my *@hotmail.nl account succeeded.
Started for me today. Ubuntu 16.04. Can receive but can't sent. Same log output as above. Its a school email running on office365
Hey folks鈥攖hanks for reporting this. I've changed the default Outlook port in 314993f0b5d25474c37eba5089366eb0acbb0b86, and we've also revised the onboarding screen so that it presents Office365 and Outlook.com / Live.com as two separate options, which should resolve a lot of the confusion I think. Stay tuned! The new version should ship in a day or two.
Hey folks! This has shipped in 1.4.1. You can get the update automatically if you're using the Mac and Windows versions, or the Linux snapcraft release, and you can also download it from https://getmailspring.com/download. I'm going to go ahead and close this and we'll re-open it if necessary. Thanks鈥攅njoy the app!
Most helpful comment
I'm not sure if the Office 365 option is meant for your outlook.com email. Office 365 is a subscription service from Microsoft. However, as the above post says, you can manually enter the IMAP/SMTP settings, but, I suggest logging into your outlook.com and grabbing the information direct from Microsoft.
For reference, here are the values: