Looks like my sendmail uses only IPv6 to resolve mx server dns name to
ip address.
14:59:50.793338 IP reticulum.xxx.ru.19032 > hercules.xxx.ru.domain:
53417+ AAAA? xxx.ru. (24)
[13/98]
14:59:50.793662 IP hercules.xxx.ru.domain > reticulum.xxx.ru.19032:
53417* 0/1/0 (75)
14:59:50.793696 IP reticulum.xxx.ru.55299 > hercules.xxx.ru.domain:
53418+ A? xxx.ru. (24)
14:59:50.794087 IP hercules.xxx.ru.domain > reticulum.xxx.ru.55299:
53418* 7/0/0 A 192.168.2.11, A 192.168.2.12, A 192.168.41.4, A
192.168.14.12, A 192.168.34.100, A 192.168.34.110, A 192.168.44.19
(136)
14:59:50.973445 IP reticulum.xxx.ru.29244 > hercules.xxx.ru.domain:
53419+ MX? xxx.ru. (24)
14:59:50.973754 IP hercules.xxx.ru.domain > reticulum.xxx.ru.29244:
53419* 1/0/1 MX kalmar.xxx.ru. 10 (63)
14:59:50.974061 IP reticulum.xxx.ru.56461 > hercules.xxx.ru.domain:
53420+ AAAA? kalmar.xxx.ru. (31)
14:59:50.974340 IP hercules.xxx.ru.domain > reticulum.xxx.ru.56461:
53420* 0/1/0 (82)
14:59:50.974570 IP reticulum.xxx.ru.28332 > hercules.xxx.ru.domain:
53421+ AAAA? kalmar.xxx.ru. (31)
14:59:50.974887 IP hercules.xxx.ru.domain > reticulum.xxx.ru.28332:
53421* 0/1/0 (82)
14:59:50.974919 IP reticulum.xxx.ru.21453 > hercules.xxx.ru.domain:
53422+ AAAA? kalmar. (24)
14:59:50.975290 IP hercules.xxx.ru.domain > reticulum.xxx.ru.21453:
53422 ServFail 0/0/0 (24)
14:59:50.975314 IP reticulum.xxx.ru.63038 > hercules.xxx.ru.domain:
53422+ AAAA? kalmar. (24)
14:59:50.975674 IP hercules.xxx.ru.domain > reticulum.xxx.ru.63038:
53422 ServFail 0/0/0 (24)
14:59:50.975749 IP reticulum.xxx.ru.38393 > hercules.xxx.ru.domain:
53423+ AAAA? kalmar.xxx.ru. (31)
14:59:50.976105 IP hercules.xxx.ru.domain > reticulum.xxx.ru.38393:
53423* 0/1/0 (82)
14:59:50.976176 IP reticulum.xxx.ru.45558 > hercules.xxx.ru.domain:
53424+ AAAA? kalmar. (24)
14:59:50.976483 IP hercules.xxx.ru.domain > reticulum.xxx.ru.45558:
53424 ServFail 0/0/0 (24)
14:59:50.976512 IP reticulum.xxx.ru.45297 > hercules.xxx.ru.domain:
53424+ AAAA? kalmar. (24)
14:59:50.976864 IP hercules.xxx.ru.domain > reticulum.xxx.ru.45297:
53424 ServFail 0/0/0 (24)
How to force it to use IPv4?
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