The total size of your mailing exceeds the recipient server limits.
Recipient mail server does not acknowledge email with the used number of mass or multiple recipients.
- For example, using 20 email address in the column of “TO” or “CC”
Step 1: Send Them Separately
For those email address failed to receive the email, send them separately.
Step 2: Check The Size Of Email
Check the size of the email send. For example, the size of the attachments you included and consider splitting into smaller emails.
Step 3: Recipient Maximum Size
If still cannot work, check with the Recipient maximum size of email they can receive.
Step 4: FTP Arrangements
If that is still prohibitive, then you may consider FTP arrangements to send those files between you and the recipient.