Ox800CCC78 Error

Something here for you to try:
How to Fix Outlook Error 0x800ccc78: 8 Steps (with Pictures)

Ooops, sorry!

Try this one then:
Outlook 2003 error code 530, 0x800ccc78 and 0x800ccc92 - Microsoft Community

Try the below mentioned steps for the error 0x800ccc78:
1. Open Outlook.
2. Click on Tools->Email account settings.
3. Click Next for View or change email account.
4. Double click on the email account.
5. Click on More settings and click on Outgoing server tab at the top.
6. Check the box My Outgoing server requires authentication.
7. Click on Advance tab and change the port number for Outgoing server to 587.
8. Click ok.
9. Click next finish.

Once you reach the point shown in your attachment, simply proceed from point number 3 described below (after selecting View or change existing email account), then select next...

Irene said:

1. Open Outlook.
2. Click on Tools->Email account settings.
3. Click Next for View or change email account.
4. Double click on the email account.
5. Click on More settings and click on Outgoing server tab at the top.
6. Check the box My Outgoing server requires authentication.
7. Click on Advance tab and change the port number for Outgoing server to 587.
8. Click ok.
9. Click next finish.

huffman said:

Thank YOU, Thank YOU that worked.

Excellent! You are very welcome.