Well , i haven't found a solution to this , yet . I have some ideas and i wouldn't mind an advice from someone who knows more than i do .Mine is a dyndns.org domain , blacklisted because used by spammers . It's more than 1 year and a half i relay my smtp traffic through my account at smtp.gmail.com .I don't like my domain mails going out as sickuser at gmail.com and above all i don't want gmail to know my emails traffic . There must be a way to get out from the spam blacklist and i have found this site http://www.cleanmymailbox.com/whitelist.html and i have sticked their instructions on my home site here https://www.gabrix.ath.cx/index.php?option=com_content&task=view&id=51&Itemid=1 is called "How to whitelist gabrix in your spam filter" .... i invite evrybody to follow the instructions in there , as you willl see i did all i could do . In the meantime i'm still not able to have mail delivered .... and maybe , here i wanted an advice from someone , i have a solution .... Sign all my outgoing mail with an hash token . What is an hash token ? read here http://www.hashcash.org/source/hashcash-1.02.spec ... What do you think ???