hi i need help i setup mail cow server incoming working fine but when i trying to send email to gmail i got reject text host gmail-smtp-in.l.google.com[74.125.24.27] said: 550-5.7.1 [103.194.88.31] The IP you're using to send mail is not authorized to 550-5.7.1 send email directly to our servers. Please use the SMTP relay at your 550-5.7.1 service provider instead. Learn more at 550 5.7.1 host gmail-smtp-in.l.google.com[74.125.24.27] said: 550-5.7.1 [103.194.88.31] The IP you're using to send mail is not authorized to 550-5.7.1 send email directly to our servers. Please use the SMTP relay at your 550-5.7.1 service provider instead. Learn more at 550 5.7.1 i also test at mail-tester .com https://www.mail-tester.com/test-rrazf281g plz help from 7 days i cant find how my outgoing mail on gmail not working

That's not directly related to mailcow - mailcow is sending the email as expected and basically works fine, however Gmail is simply rejecting your email. Check Google's error explanation page with your exact error message for more details: https://support.google.com/a/answer/3726730?hl=en#:~:text=550%2C%20%225.7.1%22%2C%20the%20ip%20you're%20using%20to%20send%20mail%20is%20not%20authorized%20to%20send%20email%20directly%20to%20our%20servers.%20please%20use%20the%20smtp%20relay%20at%20your%20service%20provider%20instead.%20for%20more%20information%2C%20visit%20'the%20ip%20you're%20using%20to%20send%20email%20is%20not%20authorized...'. Then follow the steps/information Google provides you there.

u mean to say its google problem for rejecting there option is already done reverse dns done

It's not a "problem", it is by design/expected/for a reason. Please see above link, search for your error message and perform the outlined steps.

ok i will try revert thanks for now

hi i do the process of postmaster tool verify the domain add google txt rec but there no luck

Hi, Does your hosting provider have a relay server ? If yes, use that (the error suggests that). Also your ip is blacklisted : https://multirbl.valli.org/lookup/103.194.88.31.html Please check to get your ip off the lists, and read on the options your provider has on relaying. Read the error message carefully. Also follow the instructions mailcow DNS gives to have polish your DNS settings, and test not only by sending to google but also other providers. goodluck.

Google is blocking your emails, becacuse your IP is listed on Spamhaus https://check.spamhaus.org/listed/?searchterm=103.194.88.31 You can try to remove (surpress) the IP from the list by following the instructions on the link above. Good luck.

@"mlcwuser"#p7396 hi thanks for reply but samhus rejection already removed

Hi, i looked up what domains are hosted on your ip.. Seems only one, medicarrier.in . It is still blacklisted. check : https://mxtoolbox.com/SuperTool.aspx?action=mx%3amedicarrier.in&run=toolpage

Well then I'm not sure. Too me it looks like that the whole /22 range is on a Policy Block List (PBL), which isn't a Spam list, but it might be enough for Google to reject emails directly coming from IPs in that range... _The Policy Block List (PBL)[11] is similar to a Dialup Users List. The PBL lists not only dynamic IP addresses but also static addresses that should not be sending email directly to third-party servers. Examples of such are an ISP's core routers, corporate users required by policy to send their email via company servers, and unassigned IP addresses. Much of the data is provided to Spamhaus by the organizations that control the IP address space, typically ISPs._ https://en.wikipedia.org/wiki/The_Spamhaus_Project

Mail cow outgoing mail rejected from gmail

papia

mayk

backlist i delisted that why vanishing also postmaster i alreadt verify domain also do posmaster suggetions .

i am asking about how to smtp mail relay i have to set.

mayk

ask your provider if they have a mailrelay.

don’t forget to update your dns settings after that.

papia

mayk they told they set ptr record is it enough for mail realy

[unknown] also static ip ptr rec reflect

[unknown] ok

[unknown]

papia

mayk thanks all for your reply but after i got reply here not going to telegram so its create misunderstanding also i am not expect any magical solution by prof i am developer so never expct any magical solution without logic .

thanks have a gd day

D4niel

It’s not a quick solution, but the Google mailservers also use IPv6. If your server has IPv6 addresses it may be an option to use those if there are problems with your v4 address.

mlcwuser

papia

Who told you this? Your ISP? They can tell you things all day long. The only thing we know for sure is that Google blocks this IP, and it looks like that the hole IP range is on a PBL list, which I still think is the root cause of your issue.

Again:

If your ISP can’t or won’t do anything further, try to resolve the issue directly with Google, links on how you can to do that are provided in the posts above, one of them is even included in the error logs you are getting from Google. If this doesn’t work out, you have the following options:

Switch to another ISP
Host Mailcow on a VPS
Use a commercial Mail Rely service
Use a commercial Mail provider instead of self-hosting your email (the easiest option)

papia

mlcwuser yes isp told that ptr rec is set its reflected also i told about that Google blocks this IP, so they reply e do u have any proper list that this ip is blocked

mlcwuser

can i use sendinblue.com this mail relay service which i found now .or if i do do i need my isp to anything communicate

mlcwuser

papia

If the IP is de-listed from the spam lists by now and it still doesn’t work there are still a few possibilities:

Google has the old block list still cached and it takes more time as mayk told you multiple times
Google doesn’t care and is blocking it anyways, because they block the hole subnet / IP range of your ISP, most likely based on the PBL lists.

If the latter is the case I can’t think of any other option than trying to get the IP whitelisted, using the links provided in the above posts.

papia

mlcwuser ok if u tell me from where is there any way except mx toolbox that google block this ip aur subnet so i can find from there also i try to post google community .

plz let me know thanks for your time and co operation i am very thankful to all

mlcwuser

The IP is de-listed from the PBL list now. https://check.spamhaus.org/not_listed/?searchterm=103.194.88.31

but that doesn’t really get us anywhere. We can still only guess, whether it just takes more time for Google to unblock the IP or if they block it anyways. But time will tell us at least that… ;-)

mayk

sendinblue should be fine, also found mailjet that has a free plan you can test. I don’t know either services but they should have documentation on howto set it up. sendinblue mentions e-mail support for the free plan, so best option is if you get stuck contact the sendinblue support.
Again, reminder, check that you have configured your dns records accordingly (this should be documented by sendinblue or any other service).

papia

mayk i am happy to told u that after mailling google community they whitelist our ip now outgoing mail also send

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