What if Gmail marks links in your email as suspicious
Gmail is careful to protect its users from phishing activities, so it classifies suspicious emails as spam. To prevent its users from unknowingly opening a phishing email, Gmail notifies recipients of the reason the mail is classified as suspicious. These reasons will help the senders to identify their mistakes and prevent repeating them in the future. If your URLs are improper, Gmail classifies the emails as spam with the following warning:
"Be careful with this message. The email contains a suspicious link that was used to steal personal information. Unless you trust the sender, don't click links or reply with personal information"
"Be careful with this message. Similar messages were used to steal people's personal information. Unless you trust the sender, don't click links or reply with personal information."
The above warnings make your contacts lose trust regarding your future emails, and might fail to open them and mark them as not spam. As this badly affects your email deliverability, we request you to take immediate actions.
How to avoid Gmail marking your emails spam due to suspicious URLs
The warning message shows that there's something suspicious in the URLs you used. So, focus on URLs and check that your sending practices follow the suggestions below:
Check for broken URLs
Always ensure your URLs work properly before including them in an email. Redirection to a non-existent page leads to abuse complaints from contacts.
- Blacklisted Domain
URLs with blacklisted domains are a possible reason for the warning. Check if your URL domain and sender domain are blacklisted with anti-spam services such as Spamhaus, Spamcop, Barracuda, and others. If yes, then raise a de-list request to the service.
- Don't include URLs with multiple redirections
Multiple redirections are a common trick used by spammers. When contacts encounter multiple redirections, they feel insecure and mark the email as spam. So, ensure that the URLs redirect straight to the desired page.
- Don't include shortened URLs from public services
If the domain of a shortened URL is blacklisted, URLs are considered suspicious. So, avoid publicly available blacklisted URL shorteners.
- Don't seek contacts' personal information
URLs should not be used to seek personal information such as email address, passwords, residential address, phone number, and credit card information.
- Avoid suspicious/spammy phrases in the URL or in the page redirected from the URL.
Phrases such as "online dating", "lose weight", "please help", "extra income", and "donate" make your contacts doubt the legitimacy your emails and mark them as spam. Send test emails to your Gmail account to identify if anything is wrong before sending the actual campaign.
- Maintain a proper WHOIS registry for your domain
Spam filters check the WHOIS registry for anything suspicious. The information in the registry should be original and updated regularly.
Since URLs are the gateway to your click rate, it makes sense to optimize them. If your URLs appear safe in your future emails, Gmail eventually makes your emails appropriately land in the inbox.
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