messages missing a valid messageld header are not accepted

[johnlebberes]

messages missing a valid messageld header are not accepted

550-5.7.1 

my emails from an IBM smtp server via optimum are all being rejected by gmail accounts.

the error message is above.

uses SSL port 465

i had added entries to my domain as follows

v=spf1 include:spf.protection.outlook.com include :spl.google.com include:secureserver.net  ~all

[ajojose33333344]

@johnlebberes  I am seeing similar issues, I think it's related to this but not sure:

Important: Starting November 2022, new senders who send email to personal Gmail accounts must set up either SPF or DKIM. Google performs random checks on new sender messages to personal Gmail accounts to verify they’re authenticated. Messages without at least one of these authentication methods will be rejected or marked as spam. This requirement doesn’t apply to you if you’re an existing sender. However, we recommend you always set up SPF and DKIM to protect your organization’s email and to support future authentication requirements.

Collect a message header of the email that you are sending and analyze it to see if your messages are validated with spf or dkim.

[KAM]

@johnlebberes I would guess there is some sort of RFC-compliance issue in the system you are using to create/send the email.  Recommend you open a ticket with them to confirm they are handling the Message ID correctly.  I don't think this is anything with SPF, DKIM, or DMARC. -KAM