Error 550 is an SMTP (Simple Mail Transfer Protocol) outgoing server error code.
It usually occurs when you try to send emails through your Outlook account and the email message encounters a relay error. The email returns back without being delivered with a 550 error message.
The error message is prompted as either of the following:
"550 Requested action not taken: mailbox unavailable"
"550 5 2 1 mail from refused spam site"
In other words, the error code 550 means that your SMTP server was not able to deliver the sent email to the user.
There are multiple reasons for this error message including:
Further Information and Manual Repair
Regardless of what the reason may be for the error 550 code occurrence, it is advisable to repair and fix the issue quickly to avoid inconvenience.
You may not be able to send emails from your Outlook account if the error continues. This can cause great hassle in corresponding with others timely and may create a big communication gap.
Here are some quick and efficient ways to resolve this issue on your system:
There is no need to panic when you encounter error 550. Sometimes the error message may occur because you inserted the wrong/ incorrect email address of the recipient.
In such a case, cross-check the recipient’s email address to verify if it is correct. If not, insert the correct address and try sending the email again.
If the error still persists, try other methods to resolve it. Sometimes error 550 can also occur due to incorrect SMTP settings.
Fix it to resolve the error. This can be done by opening your Outlook settings Tools and Accounts option. Now go to view/change the email account for the email account you are having problems with.
After that check, the SMTP server is set to mail.yourdomain.com. Then click more settings and then click the outgoing server tab. See if the ‘My server requires authentication for the outgoing server’ is checked. If not, then check on it. Then simply save to confirm changes. Now try emailing again.
Hopefully, this will resolve the issue.
Another reason for the error occurrence can be ISP blockage.
When the junk email volumes increase, network administrators (the people who are responsible for managing ISP servers) place restrictions on SMTP email servers to prevent spam on their network. If this is the reason, contact your ISP administrator to resolve the issue.
Malware and viral infection can also be the cause for error 550. To remove all kinds of viruses including Trojans and spyware and fix the issue right away without compromising on the speed of your PC it is advisable to download Restoro.
This is a highly functional and advanced PC Fixer embedded with multiple utilities like a powerful antivirus and a system optimizer.
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This feature boosts your PC speed significantly.
It is user-friendly and has easy navigations making it quite simple for even those users who are not technically sound to work around it and operate it with ease. It is compatible with all Windows versions.
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Error 1309. Error reading from file: pathfilename.cab. Verify that the file exists and that you can access it.When installing Microsoft Office 2003, the error message may appear in the following format: Fatal Error During Installation
DISM /online /get-features /format:table | more
DISM /online /enable-feature /featurename:[Enter the name of the feature here] –AllNote: Now if you want to disable a feature that’s already enabled in your computer, refer to these sub-steps:
Get-WindowsOptionalFeature –Online
Get-WindowsOptionalFeature -Online -FeatureName *Type feature name*
Enable-WindowsOptionalFeature -Online -FeatureName “Type feature name” –all
Disable-WindowsOptionalFeature -Online -FeatureName “Type feature name”
“There were problems installing some updates, but we’ll try again later, If you keep seeing this and want to search the web or contact support for information, this may help – 0xc1900403”The log files displayed in the error message may include, “0XC1900403 – MOSETUP_E_UA_CORRUPT_PAYLOAD_FILES”. This indicates that the payload files are corrupted which is why you’re getting the Windows Update Error 0xc1900403 and to fix it, you can try to restart your computer and install the updates again or reset the Windows Update-related folders. You could also run the Windows Update troubleshooter or use either the Standalone Installer or the Media Creation tool. For more details, refer to each one of the options provided below.
net stop wuauserv net start cryptSvc net start bits net start msiserver
net start wuauserv net start cryptSvc net start bits net start msiserver
Ever gotten an e-mail offer that seemed just a little bit too good to be true? Might’ve been a phishing attempt! These are everywhere and can come in many different forms.
So what’s phishing exactly, how can you detect it and how can you keep safe?
Phishing (pronounced like fishing) is a type of cyberattack that tricks the user into trusting the source and revealing sensitive information. Fishing being the perfect analogy, the bait is a legitimate-looking site, e-mail or file and when you take a bite, your identity, banking information and much more can be revealed and stolen.
Some phishing attempts are incredibly obvious, others are super elaborate. Like with most types of malware, cybercriminals have become extremely well-versed in phishing and anyone can fall for it. To help you recognize and avoid it, we’ll take you through a couple of phishing types and give you tips on what to do if faced with them.
This is actually the most common type of phishing. A cybercriminal creates an e-mail containing stuff like attractive offers, legitimate-looking attachments or links and makes it appear as though it’s coming from a trusted source.
For example, it looks like it’s coming from your bank or your favorite retailer. The logo looks legit and the structure of the e-mail seems familiar, so you might get tricked into clicking on whatever clickable content is in it.
Unfortunately this exposes your device to malware that hands your data off to the hacker, who can decide what to do with it further.
Like the above example, you could be approached with lucrative offers or links via text messages or social media messages. Typically, the messages seem relevant to the user as they will be made to look like they’re related to apps or services you’re using.
Voice phishing attacks are schemes that appear as though they’re coming from a credible number. Normally, you’ll get a call about something related to credit cards or taxes to get you into a state of worry, leading you to disclose personal information on the phone.
Spear phishing normally targets specific individuals within a company who are likely to have access to sensitive data. Spear phishers spend time collecting information they can use to reach out to the individual looking as trustworthy as possible. They’ll typically lead with something relevant, for example mentioning an upcoming company event, and make a seemingly legitimate request.
Whaling is a more elaborate form of spear phishing, which targets people in even stronger positions such as executives or high-value individuals. The ultimate goal is to get them to transfer financial or other sensitive information that can be used to compromise the entire business.
BEC, or Business e-mail compromise, is a specific spear phishing technique carried out via e-mail. While there are many ways this is done, most commonly you’ll see instances where the phisher poses as a CEO or similar executive, or as a lower-level employee in specific positions (e.g. sales managers or financial controllers).
In the first situation, the impersonator reaches out to employees requesting them to transfer certain files or pay invoices. In the second situation, the phisher takes control of the employee’s e-mail account and sends false instructions to other employees in order to obtain data and information from them.
There are many ways you can be aware and spot a phishing attempt. Here are some tips:
Those are some of the ways to identify and prevent phishing attacks. However, sometimes phishers disguise themselves a little too well or a misclick happens and there you go - you’ve been exposed to malware.
This won’t happen if you invest in powerful protection software from the get-go, though. A good antivirus program like Bitdefender will keep you safe from becoming a victim of phishing scams. In fact, it will protect you from malicious attacks overall.
Be it your household or your business you’re concerned about, there are a bunch of different packages and options available, providing different kinds of cybersecurity services. That’s the only way you can ever really be sure you aren’t at risk of a digital attack.
Have you ever been targeted by phishers and didn’t know that’s what it was until you read this article? Many can relate. Protect yourself before it’s too late!
So, what is Electron bot, and why it even matters if it is in the MS store. Electron bot is malware that somehow found its way inside MS Store via game clones of popular games temple run and subway surfer. This infiltration led to the infection of around 5000 systems over the globe in a very short period of time.
This malware is a backdoor that gives complete system control to the attacker. Any type of execution can be performed remotely in real-time. Usually, this kind of attack was aimed at a spread of click fraud over popular social media like Facebook, google, youtube, etc.
Electron Bot's primary goals in the ongoing campaign analyzed by researchers are:
These functions are offered as services to those who want to increase their online profits illegitimately, so the gains for the malware operators are indirect.
For now, users may take note of the publishers who released confirmed malicious game apps using the following names: