Reports may be occasionally getting sent but not consistent. Reboot, scheduling or reconfiguring the reports will not resolve the issue. Analytics-xxxx.log will indicate SMTP exception code 552 when Debug is turned on.
DEBUG [Sending Outbound Email message: ‘REPORT NAME'; To: ; [email protected]] com.vmware.vcops.platform.notification.email.EmailSender.call - details:com.sun.mail.smtp.SMTPSendFailedException: 552 4.3.1 Message size exceeds fixed maximum message size
at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2108) ~[mail-1.4.7.jar:1.4.7] at com.sun.mail.smtp.SMTPTransport.finishData(SMTPTransport.java:1889) ~[mail-1.4.7.jar:1.4.7] at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1120) ~[mail-1.4.7.jar:1.4.7] at com.vmware.vcops.platform.notification.email.EmailSender$MessageSendJob.call(EmailSender.java:233) ~[alive_platform.jar:?] at com.vmware.vcops.platform.notification.email.EmailSender$MessageSendJob.call(EmailSender.java:199) ~[alive_platform.jar:?] at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:?] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) ~[?:?] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) ~[?:?] at java.lang.Thread.run(Unknown Source) ~[?:?]Aria Operations 8.x
User SMTP may have size limit set to lower than the report/s size.
Reduce the size of the report or reports.
It might be 2 reports being generated as a bundle and get sent out. Where, one CSV and another PDF format which take up to about 20 MB. Deleting the large PDF should trim down the email size.