Send mail as spam

Hi,

A message placed in a spam folder indicates that Amazon SES has successfully delivered the message to the recipient’s mail server (ISP). At this stage, Amazon SES has no control over the message and can’t guarantee inbox placement. The ISP decides whether the email is categorized as spam and determines the overall mailbox placement. If the ISP flags the email message as spam, then the email might be placed in the recipient’s spam or junk folder.

When you say you have set up SPF, do you mean that you have set up a Custom MAIL FROM domain that allows SES server in it’s SPF record? If you have not already set up a Custom MAIL FROM domain, I would recommend setting it up as it aligns your FROM domain with the MAIL FROM domain which ensures higher deliverability : https://docs.aws.amazon.com/ses/latest/dg/mail-from.html

Additionally, make sure that you are maintaining a good reputation of your Dedicated IP by sending consistent and predictable volumes of email.

Here is a link for other best practices that you can follow while using SES : https://docs.aws.amazon.com/ses/latest/dg/best-practices.html

From the SES end, we can follow the best practices such as authentication (SPF,DKIM) and maintaining high message quality so as to ensure high deliverability, however, we cannot influence the ISP’s decision. The ISPs have multiple filters unknown to us, which decide inbox placement. For further insight, I would recommend reaching out to the ISP(Outlook) to understand what is triggering their email filters and causing the email to land in spam.

Please feel free to reply if you have further queries.