Mail on iOS: dual stack IP fails to use IPv4 when no IPv6 address is present
| Originator: | dennis | ||
| Number: | rdar://39755457 | Date Originated: | 2018-04-26 |
| Status: | Duplicate/9167855 | Resolved: | Open |
| Product: | iOS | Product Version: | 11.3 |
| Classification: | Serious Bug | Reproducible: | Always |
After enabling IPv6 iOS mail clients fails to connect my mail server that only have a A record. Changing from dns name to IPv4 in mail account (incoming server name) does work (but has problems accepting the certificate due to "name" mismatch). Steps to Reproduce: - Enable IPv6 on my router so that the iOS has both IPv4 and IPv6. - Now try to connect to a mail server that only have an A record in DNS - Open Mail and check for new mail Expected Results: Should connect to mail servers with IPv4 even if there are dual stack IP It works on my macs Actual Results: Mail writes Account error: The mail server domain.com is not responding Disabling IPv6 on the router and it works again Version/Build: iPhone iOS 11.3 (15E216) + iPad iOS 11.4 beta 2
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