Technical Tip: QR code URL detection

gmichailidis · 05-08-2023

Description This article describes that an external email sender can request a read-read receipt in an email, prompting the protected recipient's e-mail client to send a receipt or in the case of some mail clients send it automatically. When sending ...

gmichailidis · 01-30-2023

Description This article explains how to disable SMTP AUTH for IP addresses with a reputation for spam. The SMTP authentication option may create large volumes of activity logs due to spammers using automation to guess passwords or otherwise breach s...

gmichailidis · 11-01-2022

Description This article explains how to detect QR-coded URL categories in the body of an email. Scope FortiMail v7.2. Solution QR codes can be scanned to direct users to websites associated with the codes. It is possible to enable QR code URL scanni...

gmichailidis · 09-22-2022

Description This article describes how to successfully perform SPF check on mails from protected domains, when using a private DNS. Scope All FortiMail. Solution When internal mail flow reaches the FortiMail from an authorized public IP address and t...

gmichailidis · 09-22-2022

Description The article describes how to use the DKIM key pair of a parent domain and publish it on the DNS servers, in order to sign outbound emails of associated domains. Scope All FortiMail Solution Firstly, create a new DKIM key pair on FortiMail...

gmichailidis · 05-01-2023

Hello roci, The 'Sender Alignment' filter performs a comparison check between "Envelope Sender & Mail From" and "Mail From & Reply-To" headers and triggers the corresponding action when there is a mismatch in either one. It is generally not recommend...

gmichailidis · 10-05-2022

Hi Scott, From the FML side, you can use the 'Authentication Reputation' feature in order to detect the unwanted IPs trying to authenticate and temporarily block them. The 'Mail' option applies to this type of authentication attempts, so make sure it...

gmichailidis · 09-26-2022

Hello Firdausi, Usually, this log would indicate an issue with the DKIM public key or modifications in the message body. However, the 'DKIM Check Failed' log is not visible in the screen shot. It would be best to raise a TAC case for this issue, as w...

gmichailidis · 06-17-2022

Dear @admin_kshb, As you mentioned, the mail is sent from a computer in your network and the client IP in the logs is "10.99.1.106". - In this case, the SPF will be skipped since the email is coming from a private IP address.No SPF check is performed...

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Technical Tip: How to stop read receipts from inbound email

Technical Tip: How to disable SMTP AUTH option for IP addresses with a bad reputation

Technical Tip: QR code URL detection

Technical Tip: Implementing SPF check for protected domains when using private DNS server

Technical Tip: Configuring DKIM signing for associated domains

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Re: SMTP Auth Failures on Fortimail How to prevent

Re: Email delivery issue to yahoo with Error DKIM Check Failed. The body hash is not valid.

Re: Internal SFP Check fail (FORTIMAIL)

Technical Tip: QR code URL detection

Re: Internal SFP Check fail (FORTIMAIL)

Re: Email delivery issue to yahoo with Error DKIM ...

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