: mail delivery failed
#################################################
:
#################################################
Exceeded the Max Emails per Hour
Error 550 Recipient not found
503 valid rcpt command must precede data
Unrouteable address 25: SMTP error from remote mail server after RCPT
all hosts have been failing for a long time (and retry time not reached)
Disable Synchronizing Subscribed Folder Outlook
Outlook 995 / 465 SSL