In this month's issue of Infobox, Dela Quist of Alchemy Worx looks at soft bounces in his article 'Think that soft bounces are caused by a full inbox? Then think again!'.
Dela dispels the myth that soft bounces are caused by inboxes being too full, claiming that this is an outdated notion. Whilst this used to be one of the mail reasons for an email to soft bounce, Dela says 'In this time inbox sizes have dramatically increased so 'mailbox full' messages are highly unlikely to occur; Gmail currently offer 7GB of storage!'
He goes onto say 'Soft bounces should be regularly investigated because we believe that they are more likely to be caused by temporary ISP blocking than temporary problems related to individual subscribers.'