Microsoft 365
Formerly Office 365, is a line of subscription services offered by Microsoft which adds to and includes the Microsoft Office product line.
5,461 questions
When sending an email, an error was reported in the email tracking query: 550 "Sender" is invalid
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(246.4, 80%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EEJ%3C/text%3E%3C/svg%3E)
Erik John
40
Reputation points
Use the Java code in Microsoft AP user: sendMail， An error occurred while sending. Before the error occurred, everything was normal when using this, but after a few days, the error appeared
Another phenomenon is that this error only occurs when Azure invites users, but it does not occur when using administrator accounts.
Microsoft returned an error message to the email, and the following is the content of the response。
We haven't added or used this' qqqqq 'address, so we don't know why this email address appears
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(92.8, 73%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAL%3C/text%3E%3C/svg%3E)
Anthony LAVABRE 1,225 Reputation points2025-01-02T21:34:51.25+00:00 Hi,
As the error messages indicate, this is coming from the recipient.
Can you send an email to another person with the same email address domain?
Sincerely,
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Erik John 40 Reputation points
2025-01-03T06:01:16.2466667+00:00 Hello
it's not the recipient's fault. Because sending with my administrator account was successful
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