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Disable Greylisting

6496935 shared this question 4 years ago
Need Answer

Is there a way the user, or admin can disable greylisting on my account. My bank is unable to send me email and after much head scratching, it must be due to the greylisting. Clearly their mail servers aren't setup properly to follow RFC! I've had to change my bank to another email address temporarily


Thanks

Comments (5)

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I prefer solving problems in general and not to collect individual workarounds. Please provide a name of the bank or (better) hostnames/domains so that we're able to investigate their systems and ip networks. We're then able to whitelist their source ip network which is better for everybody, because maybe also other customers of our ISPs are customer of that bank.


Please send it directly to me: p.heinlein@mailbox.org

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I am also facing similar issue with my bank. My bank is HDFC hdfcbank.com

Can you disable greylisting for my bank also? Thank you.

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Just disable it in the spamfilter setttings.

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Thank you. It worked.

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Wow.

After yet another failed business transaction in hurry, i looked at this and I realized there are thousands of graylisted emails in just 2 mailboxes. It's like a standard process. All legit servers, gmail, paypal, banks. Nothing is remembered, same senders get delayed again and again. This is jawdropping considering the wiki:

Risk that any legit e-mails get blocked (False positives): Virtually zero.
The graylisting takes up to shocking 2 days. Despite wiki:

After five minutes have passed, the client is then automatically permitted to try again to deliver the e-mail message

I was literally out of email service for years and didn't know.

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I'm a bit sorry, but I haven't get the point. Greylisting temporarily rejects mail from other mail relays, which is a 100% standard behavior, that happens a millions/billions times a day, specially from the big ISPs like Gmail.

What do you mean with "thousands of greylisted emails in just 2 mailboxes". It is logically *impossible* to have greylisted emails in mailboxes.


In general: Greylisting does not takes 2 days. It it WOULD take two days, then the sender did no retry for two days. This is like a phone call: If it's busy, you should re-call after some minutes. If you re-call after two days, you can't blame the sender he was unreachable for a long time -- simply not true. And if somebody would retry after two days, he would be mostly impossible to deliver mail to Gmail, GMX or somebody else. And, for sure, he's doing VERY VERY much totally wrong. Every common SMTP server software will re-deliver after 5 minutes. Every.


Hower: If you don't believe that -- simply deactivate greylisting. You can do, whatevery you want.

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It is perfectly possible to have greylisted emails in mailboxes, as it's in the headers as they get delivered later. The delay is recorded and corresponds to time difference between last link of the other party and the first mailbox server.


However the super high values like 170000 seconds don't have the time difference. I don't know why postgrey-1.37 at mx1 loves to drop this message in this cases.

What is notable is I have 0 occurences of this header in 20 years before using mailboxorg, and thousands now. Interesting. I definitely turned the option off.

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So I've been searching for how the greylisting actually works and I found this stackexchange response- https://unix.stackexchange.com/questions/359783/postgrey-delaying-longer-than-greylist-time-why

So essentially the X-Greylist: delayed xxxx seconds just means that the sending server reattempted sending the mail after xxx seconds and it has nothing to do with mailbox.org service. I've turned it off for the time being just to be safe and will turn it on if spam becomes an issue.

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While useful, it can cause a fair amount of trouble to users. I was trying to log on a site that required I click a link on the verification emails, but the emails arrived 10-15 minutes late and had expired.


Users should be forewarned about this feature (and the SMTP plausibility check which also caused all my bank verification emails to fail since they were using Sendgrid).

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