One interesting factor in this campaign is the exploitation of security firm Symantec. SEE: Fighting social media phishing attacks: 10 tips (free PDF) (TechRepublic) Designed to resemble Microsoft OneDrive and Adobe pages, the login page asks recipients to enter their account credentials, which are then captured by the attacker. Clicking on the link redirects the recipient through several pages, ending with one asking for login details. Sent to an employee who works with real estate, the phishing email contained a link to a PDF that purportedly included bid details for an upcoming building project. Security incident response: Critical steps for cyberattack recovery (TechRepublic Premium) The 10 best antivirus products you should consider for your businessĨ enterprise password managers and the companies that will love them In a blog post published Thursday titled “ Credential Theft Using Symantec URL Rewriting,” Armorblox describes how this campaign operates. A new phishing attack analyzed by Armorblox takes advantage of Symantec to trick users into falling for the scam. That’s especially true with phishing emails that attempt to hide the source of their deceptive landing pages and spoof or reference a well-known company or brand. If you found this article useful, consider sharing it on social networks.Spammers and scammers typically try to obfuscate and legitimize their malicious content in an effort to better trick people. How did you solve your 553 SMTP issue? Drop a comment and let us know. Contacting them about this problem solved the issue. It turned out the problem was not with my email client Microsoft Outlook, but with my hosting provider. They are listed in this article, but the cause of the problem could also be on the recipient’s end, as it was in my case. When tackling 553 SMTP email error, most suggestions found on the web is focused on what sender getting this error should do. This makes sense since some mail administrators use the 553 error if a user doesn't exist. As my domain was now missing in the old server, those emails were bounced back to the sender with an SMTP 553 error. The hosting provider migrated my domains to a new server, but didn’t set configuration correctly, so some of the emails were still being redirected to the old server. In the end it turned out, that the problem was with them. Unable to find the solution online, I decided to contact the support of my hosting provider. If nothing of the above worked for you, and the problem occurs only when sending email to specific domain (part of email after then the problem is most probably at the recipient’s end. In AuthSMTP article, this option can be found on the Change Account window shown in step 4. Toggle SPA (secure password authentication).In AuthSMTP article, this is shown in step 7. In AuthSMTP article, this is shown in step 6. Since most mail servers require an authentication, this error could happen when the sender has SMTP authentication turned off. Turn on SMTP requires Authentication option.For step by step instructions on how to accomplish these changes in Microsoft Outlook 2013, check this AuthSMTP article. If you get bounced email with 553 error while sending email, try one of the suggestions below. If you have the same issue as me, then skip to the next section. In my case, I was sending emails just fine, receiving the emails did not work as it should. Unfortunately, those suggestions were intended for people getting the 553 SMTP error message while sending the email. I found several suggestions on how to fix this error. Looking for answers on the web, This seems to happen when a mail server refuses to act as a relay. SMTP error from remote mail server after RCPT TO:ĥ53 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1) Possible solutions
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