Outlook 365 does not receive mails from server but it sends mails alright

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My Outlook 365 does not receive mails from the server, but it sends mails alright
My Outlook manages two mail accounts, one is an *.ost (IMAP) and the other an *.pst (POP). The problem happens with the *.ost (IMAP) mails. It came all of a sudden, a few days ago, and it has stayed since then. I had not previously actualized Office or Windows 10. I was working at the Laptop when I realized something strange was happening with the incoming *.ost mail. Furthermore, I have checked the server’s webmail and I can’t see any problem, it receives and sends mails normally. My phone receives and sends mails normally. What can I do? I will appreciate your help! Thanks. Oiluj

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My immediate thoughts would be the security/port settings for your imap/pop3 server. For example, “insecure” settings are encryption = none and port = 143 (imap)/110 (pop3) respectively whereas the “secure” settings are encryption=SSL/TLS and ports = 993/995 respectively. Check those settings on your phone and see if your computer is set the same.

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Oilujarm

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Thanks, this is too technical for me, I’m afraid

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Oilujarm wrote:

Thanks, this is too technical for me, I’m afraid

The information provided is necessary for you to receive mail. If the settings are wrong you will never receive mail.

btbs wrote:

My immediate thoughts would be the security/port settings for your imap/pop3 server. For example, “insecure” settings are encryption = none and port = 143 (imap)/110 (pop3) respectively whereas the “secure” settings are encryption=SSL/TLS and ports = 993/995 respectively. Check those settings on your phone and see if your computer is set the same.

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Oilujarm

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It has never happened to me before that all of a sudden, these settings change. It’s been over four years since I have been working with this laptop without this problem appearing. I’ll do my best to find out the present settings

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geekdom wrote:

Oilujarm wrote:

Thanks, this is too technical for me, I’m afraid

The information provided is necessary for you to receive mail. If the settings are wrong you will never receive mail.

btbs wrote:

My immediate thoughts would be the security/port settings for your imap/pop3 server. For example, “insecure” settings are encryption = none and port = 143 (imap)/110 (pop3) respectively whereas the “secure” settings are encryption=SSL/TLS and ports = 993/995 respectively. Check those settings on your phone and see if your computer is set the same.

Well I have an Iphone and I am unable to find how to check settings there. However, my laptop settings are IMAP No encryption and port 143. POP3 is also No encryption and port 110. Let me remember that I have no problems with the POP3 account and the IMAP account can send but not receive. I have tried to change the IMAP settings changing 143 to 993, this is allowed, but Outlook does not accept encryption SSL/TLS it keeps asking me to go back and review. Finally, I have decided to go back to the original 143 with No encryption, but then Outlook rejects changing back to No encryption, 993.
The mail is still not being received

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Since you don’t mention who is your eMail provider (Outlook is your eMail Program) we can’t give you exact information.

On your eMail provider’s website there is information for the correct ports and security settings to use for outgoing=send (SMTP) mail. Go to your eMail provider’s website and look for these settings (probably under Support – email setup/server settings).

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Oilujarm

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PKCano wrote:

Since you don’t mention who is your email provider (Outlook is your email Program) we can’t give you exact information.

On your email provider’s website, there is information on the correct ports and security settings to use for outgoing=send (SMTP) mail. Go to your email provider’s website and look for these settings (probably under Support – email setup/server settings).

Well thanks, I’m in Spain and my email provider is Movistar. Their website settings for my account indicate that IMAP’s port is 143 and there is no connection security. SMTP’s port is 25 and there is no connection security. None of these settings can be edited

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The only support available at the website is for edit/recover passwords

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I don’t have an iphone so can’t tell you how to check the settings there but this might help to check what the correct settings are: https://support.apple.com/en-us/HT201320

As an alternative, https://mailsettings.net/iphone/movistar.es/ shows that the imap settings are

Incoming (IMAP) Mail Server Configuration
Server Hostname imap.movistar.es
Server Port 143
Username The part before the @ sign of your e-mail address
Authentication Password
SSL/TLS Yes

Outgoing Mail Server Configuration
Server Hostname smtp.movistar.es
Server Port 25
Username The part before the @ sign of your e-mail address
Authentication Password
SSL/TLS Yes

Once you’ve got the correct setting information…

I’m assuming by Outlook365 you’re talking about the outlook application installed on your laptop. IF that is correct, you can check/set these settings as follows:
1. Click “File”
2. On the right hand side, click “Account Settings”
3. In the drop down, click “Account Settings”
4. In the dialog box that comes up, click on you email account then “Change” in the menu
5. Check the settings “Server information”, “Logon Information” match the above and then click “More settings”
6. Click the “Advanced” tab and check that the incoming server port matches the above, that “This server requires an encrypted connection (SSL/TLS)” is selected. While you’re their you can also check whether the smtp settings are correct.

 

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Oilujarm

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btbs wrote:

I don’t have an iphone so can’t tell you how to check the settings there but this might help to check what the correct settings are: https://support.apple.com/en-us/HT201320

As an alternative, https://mailsettings.net/iphone/movistar.es/ shows that the imap settings are

Incoming (IMAP) Mail Server Configuration
Server Hostname imap.movistar.es
Server Port 143
Username The part before the @ sign of your e-mail address
Authentication Password
SSL/TLS Yes

Outgoing Mail Server Configuration
Server Hostname smtp.movistar.es
Server Port 25
Username The part before the @ sign of your e-mail address
Authentication Password
SSL/TLS Yes

Once you’ve got the correct setting information…

I’m assuming by Outlook365 you’re talking about the outlook application installed on your laptop. IF that is correct, you can check/set these settings as follows:
1. Click “File”
2. On the right hand side, click “Account Settings”
3. In the drop down, click “Account Settings”
4. In the dialog box that comes up, click on you email account then “Change” in the menu
5. Check the settings “Server information”, “Logon Information” match the above and then click “More settings”
6. Click the “Advanced” tab and check that the incoming server port matches the above, that “This server requires an encrypted connection (SSL/TLS)” is selected. While you’re their you can also check whether the smtp settings are correct.

 

I have followed your first link and I have been able to check my Iphone settings. For IMAP the user’s SSL button is unchecked and the port is 143. For SMTP the user’s SSL button is also unchecked and the port is 25. The mail settings on my Laptop are: IMAP No encrypting. Port 143. SMTP Encrypting STARTTLS Port 25.
By the way, I have also deleted and added back the password and restarted Outlook, all without effect. When I refer to Outlook365 I’m trying to make clear that it is the Outlook application integrated in Microsoft 365, Office package, installed in my laptop.

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I just want to advise you that the problem has been solved by Microsoft’s technical support. They have kept a chat going with me for 10 days. Thanks to everybody that helped me in this forum. See you again!

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Oilujarm wrote:

I just want to advise you that the problem has been solved by Microsoft’s technical support.

What was the solution?

Carpe Diem {with backup and coffee}
offline▸ Win10Pro 2004.19041.572 x64 i3-3220 RAM8GB HDD Firefox83.0b3 WindowsDefender
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online▸ Win11Pro 22H2.22621.1413 x64 i5-9400 RAM16GB HDD Firefox112.0b3 MicrosoftDefender

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