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Hello, this is a rather curious problem, I have the following log:
Heads up! The last email your site attempted to send was unsuccessful.
Email Source: Newsletter
Mailer: Other SMTP
SMTP Error: data not accepted.I can confirm that both From email and From name boxes are ticked. This problem only occurs when sending out newsletters with the Newsletter plugin. I had this same problem for Yahoo earlier but now it is affecting Gmail users too. A week ago the newsletters went thru to our Gmail users just fine. Is there any way I could get a more detailed log on why are the emails failing?