Common Outlook Error codes

0x800CCC65 — This error code indicates that a local firewall such as Zone Alarm or anti-virus software such as NOD32, Norton Antivirus, or McAfee is blocking outgoing connections to your mail server. Try disabling any of this software and see if this error still persists.

0x800CCC67 — This error is caused due to few things: the ISP is blocking port 25, a local firewall or anti-virus program may be blocking SMTP communication or the account in Outlook must be set up incorrectly. It can be resolved by change thing SMTP port from 25 to 26. It is advisable to disable any firewalls or anti-virus software.

0x800CCC78 — The sender address should be a full email address, not a username. Kindly set up your account in Outlook/Outlook Express by using full account name such as [email protected] instead of a ‘username’

0x800CCC79 — Make sure that client has set up to authenticate SMTP before POP as this is why the error code 0x800CCC79 indicates is the problem.

0x800CCC92 — Access the cPanel as you see this error 0x800CCC92, there might be an issue with the password for the email account being used or that the email account has become corrupted.

0x8004210B – Please consult with the following Microsoft Documentation link as this is a client-side issue: .

0x8004210A — Please consult with the following  Microsoft Documentation link as it is client-side: .

0x800C0133 — Please go through the following Microsoft newsgroup link as it shows that Outlook Express mail store has been corrupted:…

In case you do not get satisfied, please see the below link for information on disabling your virus scanner’s Outlook Express integration.…

0x800CCC19 — The following Microsoft Documentation link has been helpful as it looks to be a client-end issue with local anti-virus software: .

0x800CCC0D — The following Microsoft Documentation link as it denotes common work fixes for the error you’re experiencing: .

0x800CCC0E — The following Microsoft Documentation link as it denotes how your ISP is blocking ports required for email access: .

0x800CCC0F — The following Microsoft Documentation link as it denotes it could be due to many things on client-side from local firewalls: .

0x800CCC0B — Please check the following Microsoft Documentation link as it narrates common work fixes for the error you’re or have been experiencing: .

The following steps can be taken into account other mentioned above.

Your email client is misconfigured

Your ISP is blocking port 25

There is a DNS problem with the ISP

Try the ISP’s outgoing mail server if the problem persists

There is an error with SMTP on one of our servers

Below you will find the most common solutions to fix the above problems:

Shutdown and restart your computer.

Change the Outgoing Port from 25 to 26. Many ISPs are now blocking port 25 to prevent their clients from spamming.

Temporarily turn off all virus and/or firewall software.

Complete email address for Email Address & User ID.

POP, IMAP, SMTP will be

Make sure Outgoing server has selected “Requires Authentication”.

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