Can't Send to Gmail!

[rohanmcdermott]

Hi,

Ive noticed that quite a few people have been having this issue and there are quite a few similar posts. Essentially, when I try and send an email to a Gmail account, it bounces with an error:

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   SMTP error from remote mail server after end of data:
   host gmail-smtp-in.l.google.com [2a00:1450:400c:c07::1b]:
   550-5.7.1 [2001:41d0:e:468::1] Our system has detected that this message does
   550-5.7.1 not meet IPv6 sending guidelines regarding PTR records and
   550-5.7.1 authentication. Please review
   550-5.7.1  https://support.google.com/mail/?p=ipv6_authentication_error for more
   550 5.7.1 information. c191si13065654wme.44 - gsmtp

Ive google'd the issue and found quite a few different 'solutions'. I have tried them all etc and can't seem to get it working. One of the solutions which popped up most frequently was "fix your SPF record so that it passes mail originating from your IPv6 address."

I currently use CloudFlare to handle the DNS etc. Would someone be able to tell me exactly what text to put into the record to make it work?

Any other solutions would be greatly appreciated!

Thanks,
Rohan

[skurudo]

You have two ways:
- disable ipv6 in exim and be happy on ipv4
in exim config need to add

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disable_ipv6 = true

and restart exim service

- or you can make or edit your DNS settings - TXT with spf, something like this:

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v=spf1 a mx ip4:your-ip ip6:your-ip ~all

And ask hosting provider add PTR for your domain (ip4 and ip6)

[rohanmcdermott]

Hi,

Thanks a lot for your reply!

I have managed to get the second option working! I added a reverse record on the IPv6 (already had one on IPv4) and then added the TXT - MX record as stated.

Thanks a lot for the help! You have solved an issue which i have been trying to fix for ages!

Thanks,
Rohan

[skurudo]

You're welcome, Rohan ;-)