For several weeks now when I try to send an email in emClient via Outlook the email ends up in the Local Folders Outbox and won’t transmit. There are no errors in the Operations log. I checked Outlook’s (Live.com/consent/manage) and emClient is authorized to send email.
What’s going on here?
I am having the same problem, currently without solutions.
For several weeks now when I try to send an email in emClient via Outlook the email ends up in the Local Folders Outbox and won’t transmit.
If this is an Outlook.com type acct, could be “you don’t have Airsync enabled” in your account setup.
Go to “Menu / Accounts” and select your account on the left. Then click the “General tab” along the top. Now in “Services” part way down see if you have ticked the box marked “AirSync”. If you haven’t, check that box and then save accounts.
If you already have AirSync enabled, then could be related to eg: too larger file attachments and the SMTP server won’t allow the message to send. Microsoft allow approx 20MB in size. So if you do have a large file attachment like that, you can alt send using eM Client “Cloud attachments” to send large files via eg: One Drive, Google Drive, Dropbox etc. See this link for info.
Now “if you don’t have large file attachments and your emails are stuck in the outbox”, then sometimes that can be related to background resident programs interfering with the outgoing mail such as eg: Optionally installed Antivirus programs or Optionally installed Firewall Security programs or VPNs. So if you have anything like that, try completely disabling those to test.
Now if you don’t have any optionally installed programs like that or disabling those made no difference, then could be “a possible corrupted account in eM Client” and you might then need to try removing and readding your Outlook account via the "automatic account wizard at the top of accounts.
Note: If you do try removing and readding your account, make a manual Backup first via “Menu / Backup” just incase you need to restore for any reason. You can see when the backup is complete in “Show Operations” via clicking the drop-down on the right of Refresh top left.
Now if removing and readding your Outlook account still cannot send mail, then update what your SMTP mail account settings are and also what version of eM Client you are running. Also if you are running Windows or Mac & OS version.
Thank you Cyberzork.
I followed your instruction, and issue seems to be solved after removing and re-adding my Outlook account. I did it manualy because I didn’t found automatic wizards.
After that, I sent a trial e-mail and it was sent correctly.
Only point: it has been received in the spam of the receiver mail box.
Could mean something?
Doing this operation, I remembered that I already did it some weeks ago, and at a first time the sending of new emails worked.
After few days, it stopped again.
I will check in the next days if it happens again or not.
In the meanwhile, thank you for your feedback.
I did it manualy because I didn’t found automatic wizards.
The automatic account wizard is when you click “Add Account” at the top of accounts, you enter your email address and follow the prompts.
The manual adding of accounts is "Add account / Mail / and Manually selecting your account.
Only point: it has been received in the spam of the receiver mail box.
Could mean something?
That just means that either “their mail server” or “their mail filtering program” thinks that something in the header, subject or body of your email is possibly spam so moves it into their spam folder.
All the other party needs to do is, “click on your email in their spam / junk folder” and “Mark it as not Junk / not Spam” and that will ensure it stays in their Inbox for future.
Doing this operation, I remembered that I already did it some weeks ago, and at a first time the sending of new emails worked.
After few days, it stopped again.
If it stops working again, “and you haven’t changed anything in eM Client”, then that means usually “something outside of eM Client is causing it to stop”. I don’t personally ever have to resetup unless I setup a new computer or profile etc.
That can be another resident program running on the computer, or it can be a physical Internet connection issue, or it can be a mail server issue.
Unfortunately, after few days I tried again to send an e-mail and the issue came back.
I made a further check by trying sending the e-mail from Outlook web, and:
I am trying to understand why frome the Outlook web it works and it is received in the inbox and not in the spam.
That seems that sending from eM Client makes some further step that is not working properly.
Hi, @Fabio4
I’ve been having lots of problems with my Outlook account, too. It seems to be a problem on Microsoft’s side since eM Client works without any problems with all other email providers.
What helped in my case was I went into Menu → Accounts, selected the Outlook account, and ticket “AirSync” in the “General” tab, then pressed “Save and close”. As a result, eM client now works with the Outlook account, although it remains to be seen how long this will be the case 
I’ve been having the same problem. When I checked the Accounts settings for Outlook “AirSync” was already checked. I even tried hitting the “Reauthorize” button which didn’t cause the message to send either. The only thing that seems to work for me is removing the Outlook account and then re-adding it. However, that only works until I try to send another message, which is usually after I have closed and reopened eM Client, and then when I try to send another message I have to go through the whole process all over again. Very frustrating. At this point the only solution seems to be to set a different account (Yahoo Mail) as the default.
Ive had the same ‘cant send with an Outlook email, all stuck in outbox, doesnt get to sent folder’ and the only thing that fixed it was deleting the account from emclient, i rebooted pc just to clean anything from memory, then I added the account back in, instant fix! … I use gmail with emclient no problem, but outlook is my main addy so Im glad I got it back. when emclient fell over I installed Thunderbird and BlueMail - both worked perfect when emclient wasnt sending. But I prefer to use emclient, so Im back
As I said before, this has been a continual issue so I simply switched my default account to Yahoo Mail. Problem solved. I can still receive mail from the Outlook account. I just can’t send messages when Outlook is the default account and it’s not worth the aggravation of constantly removing and re-adding that account.
An opinion: as it should be a problem affecting a lot of people, could it be worth to find a way to contact eMclient team to share it and understand if any action from development side is possible? If yes, how to contact them?
