Invalid address SMTP_FROM

I also get the same message if I use sendinblue.

Versions:
WordPress: 5.5.1
WordPress MS: No
PHP: 7.4.11
WP Mail SMTP: 2.4.0

Params:
Mailer: sendinblue
Constants: No
API Key: Yes

PHPMailer Debug:
Invalid address: (From): SMTP_FROM

Hi @jamecl,

does the error actually say “SMTP_FROM”, or did you remove your actual email address for security reasons for posting on this public forum?

For Sendinblue, you should be using the from email address that you registered in their dashboard.

Do you have any other SMTP plugins installed and active? There might be a conflict, which changes the from email address…

Take care!

I am also getting this same error, no i do not have any other plugins that would change the from name

Also getting this error. Verified everything is correct including my from email.

Versions:
WordPress: 5.7
WordPress MS: No
PHP: 7.4.16
WP Mail SMTP: 2.7.0

Params:
Mailer: sendinblue
Constants: No
API Key: Yes

PHPMailer Debug:
Invalid address: (From): SMTP_FROM

Hi everyone!

Could you please check if there are any Must Use plugins on your site like this one. If so, you need to deactivate them.

Or any other email sending plugins that might clash with our plugin, by setting a different from email…

Also, we recommend checking “Force From Email” as well under WP Mail SMTP -> Settings area, which will make sure that emails from your site are sent from this valid email address.

I hope this helps!