https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix en a blog about Debian and self-hosting Thu, 10 Apr 2014 14:04:00 +0000 PluXml https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397138694-1 https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397138694-1 @Jacques : Yes, unfortunately some websites coded by lamers refuse it indeed. For those cases, I simply use manually defined addresses, which I delete after one year: user-year@. I prefer that to using - or _ as a delimiter, because there are use cases for these characters in the user name (- between the two parts of composed first names, and _ between first and second names of users for which the first name is not enough). Thu, 10 Apr 2014 14:04:00 +0000 Tanguy https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397138351-1 https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397138351-1 if you chnage the recipient_delimiter in postfix, don't forget to change it in your lda: for dovecot don't forget to change all occurences of: recipient_delimiter = + with recipient_delimiter = _ in your dovecot configuration Thu, 10 Apr 2014 13:59:00 +0000 Jacques https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397138026-1 https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397138026-1 many sites refuse the "+" character in mail address. I prefere to use another character (_for example). In main.cf: recipient_delimiter = _ Thu, 10 Apr 2014 13:53:00 +0000 Jacques https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397054348-1 https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397054348-1 @#6: I misread Marcos's reaction. I thought he asked for a solution where he wanted to reject every e-mail except for the e-mails to <user+insurance.com@example.com>. Wed, 09 Apr 2014 14:39:00 +0000 Tim https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397053315-1 https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397053315-1 @Marcos Dione : Personally, if that was my bank or my insurance company, that kind of information leakage would be reason enough to change to another one. I already did for other reasons and I can do it again. But the easiest way without leaving your untrustworthy bank would be to tell them you have changed your email address, and give them another one while disabling the old one. @Tim : I do not see how reject_unlisted_recipient would be related to that, it is meant to refuse messages to addresses your server know that they do not exist, such as non-existent users in the local domain. Wed, 09 Apr 2014 14:21:00 +0000 Tanguy https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397050605-1 https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397050605-1 @Marcos: do you need something like "reject_unlisted_recipient"? See <http://www.postfix.org/postconf.5.html#smtpd_reject_unlisted_recipient>. Wed, 09 Apr 2014 13:36:00 +0000 Tim https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397046977-1 https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397046977-1 @Tanguy: you're assuming that you don't even want mail from evilcorp, that might as well be you insurance company or something like that. would it be possible to make it user+insurance.com and then answer like that for any domain!=insurance.com? Wed, 09 Apr 2014 12:36:00 +0000 Marcos Dione https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397038293-1 https://tanguy.ortolo.eu/blog/article126/disable-spammed-addresses-postfix/#c1397038293-1 @Tanguy, @Alberto Luaces: You can still blacklist emails coming to the address without the +xyz part. Wed, 09 Apr 2014 10:11:00 +0000 Erbureth