E-mails contradicting each other

Hi,
first of all, great plugin, thanks ??

Now the issue.

Every time the backup process takes place I receive two e-mails:
* the first one contains the attachment (it’s only 1.3MB) and, among the other sentences, “The backup file should be attached to this email.”
* the second one is without the attachment and with “Unfortunately the backup file was too large to attach to this email.”

What’s wrong?

Thanks,
Giacomo

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