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Windows 7: Outlook cannot connect to your outgoing (SMTP) e-mail??

17 May 2010   #1

Windows 7 Home Premium 64-bit Edition
Outlook cannot connect to your outgoing (SMTP) e-mail??

I've spent about 8 days trying to figure this error message out.

Outlook cannot connect to your outgoing (SMTP) e-mail server. If you continue to receive this message, contact your server administrator or internet service provider (ISP).

It is a work email Pop3 account, and we have a company that scans our email for viruses "electric mail". My administrator has taken all of the necessary steps to make sure my account is authorized with them, and I have a password and login credentials. I am able to receive email, but not send it out. I do not have to VPN, and all my settings are the way they should be side by side with the other employee's settings. I have windows 7 Home Premium 64-bit edition, with Microsoft Office Enterprise suite.
Checked with my ISP and they do not block any of the ports. I uninstalled my Mcfee Virus Protection software.
My login name and password are exactly put in as the administrator gave them to me. For incoming (Pop3) Port 110 and outgoing (SMTP) Port 25. For both incoming and outgoing mail server I have the exact IP address that was copied from another employee's computer. I am able to log onto the incoming, but unable to log onto the outgoing.
****Note: I am able to send and receive email when I am physically at the office, but unable to send when away. This is not an Exchange server so I do not have to be VPN'd in, but to make sure I always VPN in anyways. Anything would help.

My System SpecsSystem Spec
17 May 2010   #2

Windows 7 Ultimate (x64) SP1

Try using SSL port 993 for incoming and SSL port 465 for outgoing.
Also make sure you tick "My outgoing server (SMTP) requires authentication" and select "Use same settings as my incoming mail server"
My System SpecsSystem Spec
18 May 2010   #3

Dual boot XP Pro SP3x86 and Win7 Pro x64

Also . . . review the options in the CONNECTION tab (most likely LAN), and in the ADVANCED tab double-check your encrypted connection, from the drop-down menu, as required.

Here is a list of the default email port numbers:

  • POP3 - port 110
  • IMAP - port 143
  • SMTP - port 25
  • HTTP - port 80
  • Secure SMTP (SSMTP) - port 465
  • Secure IMAP (IMAP4-SSL) - port 585
  • IMAP4 over SSL (IMAPS) - port 993
  • Secure POP3 (SSL-POP) - port 995

My System SpecsSystem Spec

18 May 2010   #4

Windows 7 Home Premium 64-bit Edition
Hmonk, tw33k

Thanks for the response. Unfortunately the 995/993 port will not even let me log onto the incoming Pop3 server when before I was able to through port 110. As for port 465 it still will not log on.

Let's say if I have the correct ports assigned, my administrator took all the necessary steps to clear me with our e-mail security company "electric mail", I have the correct username and password.

What about the part where is tells you to input incoming mail server and outgoing mail server. I have the IP address they gave me, and it's exactly the same for both incoming and outgoing. Would this be an issue? If I uninstalled my Mcfee software would windows 7 firewall be blocking any of these ports, and how would I unblock them?

The weird thing about this is that when i'm physically at the office and logged into the wireless network it automatically maps all of the drives and I can see all of the folders and printers on the network. When i'm away from the office and I VPN in I can only see the drives that I mapped. ****Note this is not a Microsoft Exchange account so I should not have to be VPN'd in to access my e-mail. Why should I have to log onto incoming and outgoing mail server to get my email? If its a basic Pop3 email account shouldn't I be able to get my email through a basic internet connection?
My System SpecsSystem Spec
18 May 2010   #5

Dual boot XP Pro SP3x86 and Win7 Pro x64

I know you said your ISP verified that no ports are blocked but I was wondering if you would be able to access your POP3 accounts via Wi-Fi or a friend's/neighbor's ISP?

I ask, in part because I am a cynic; I also went 15 rounds with my ISP a few years back because they were blocking .MIL addy's but assured me they were not (it was unintentional on their part but "support" personnel kept parroting company policy without actually checking).

Otherwise, if your lappy has the same/correct settings as others - and - your POP3 accounts can be accessed at the office - and your ISP does not block ports, I've got to scratch my head about this one. I'll keep digging, though.

Re disabling McAfee: I should think that, since all is well at office, AV or other apps would not be the issue - but, hey, at this point anything seems worth a try.

My System SpecsSystem Spec
18 May 2010   #6

Windows 7 x64 Ultimate

ISPs nearly always block the SMTP mail port for all but their own network unless it's a buisness or other high end account. Even when they say they don;t block any ports, they block that ONE port. POP is ususaly not blocked but I wouldn't put it past some of them.

Some external mail services open port 2525 for SMTP to get around the ISP problem. Maybe something like that would help. Set up your mail server to use 2525 as well as 25 and then set up outlook to use 2525 for SMTP.
My System SpecsSystem Spec
18 May 2010   #7
The Howling Wolves

Windows 7 Home Premium 64bit

Have you tried downloading Microsoft Outlook Controller?
The problem you are having is similar to the one I experienced and it worked for me.
I am not a cert tech. Do a search in this forum for Outlook controller. Hope this helps.
My System SpecsSystem Spec
26 Sep 2015   #8
Eric in IL

Windows Vista Home Premium 64bit

I am using Microsoft Outlook 2007 with an internet webmail service not through my ISP. This thread is several years old, but it is the first one I came upon when having this similar problem which started right after I changed internet service providers. Following other forum discussions I found that my ISP is blocking my outgoing mail SMPT port (25). They do this to combat spammers. Solutions:

1. Pay my ISP an extra $10 per month to have a static connection in which port 25 is not blocked
2. Go into my Outlook account settings and switch my outgoing SMPT port to 587 instead of 25 (this was the suggested fix by the ISP after 10 minutes on hold): In Outlook click "Tools - Account settings - change - more settings -advanced" then changed the server port to 587.
3. Go to my webmail provider ans search through their problems.

My mail provider said switch to an alternative port (happened to be 26) and it is working fine.
My System SpecsSystem Spec
05 Jan 2016   #9

Win 7

When I run telnet 25 , the server doesn't respond (need to install telnet first).
Something in Windows 10 is blocking traffic to TCP 25. I tried adding an allow rule to the Windows firewall though it didn't work.
I fixed this problem by changing my mail client to use SMTP TCP port 587 with TLS instead of TCP 25. Worked like a dream.
sfc /scannow didn't work for me.
My System SpecsSystem Spec

 Outlook cannot connect to your outgoing (SMTP) e-mail??

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