For the domain with too long TXT entry,xeams will has problem.

For example:

Domain: icbc.com.cn

Final SPF result is: v=spf1 ip4:202.108.88.4/32 ip4:219.142.91.4/32 ip4:60.247.99.195/32 ip4:123.127.121.195/32 ip4:202.108.88.10/32 ip4:123.127.121.225/32 ip4:219.142.91.28/32 ip4:60.247.99.225/32 ip4:218.205.182.36/32 ip4:61.129.111.231/32 ip4:140.206.54.231/32 ip4:180.169.80.231/32 ip4:211.95.81.231/32 ip4:117.131.126.189/32 ip4:117.184.157.231/32 ip4:116.236.244.245/32 ip4:58.246.164.245/32 ip4:180.169.119.220/32 ip4:112.64.230.220/32 ip4:120.204.111.220/32 ip4:117.131.49.220/32 -all

But Xeams only return: v=spf1 ip4:202.108.88.4/32 ip4:219.142.91.4/32 ip4:60.247.99.195/32 ip4:123.127.121.195/32 ip4:202.108.88.10/32 ip4:123.127.121.225/32 ip4:219.142.91.28/32 ip4:60.247.99.225/32 ip4:218.205.182.36/32

That case SPF fail result.

X-SM_EnvelopeFrom: webmaster@icbc.com.cn
X-SM_SENDER_IP: 61.129.111.231
X-SM_ReverseDNS: icbc.com.cn tns1.icbc.com.cn cns2.icbc.com.cn bjtns2.icbc.com.cn shuni.icbc.com.cn shtns.icbc.com.cn ns114.icbc.com.cn
X-SM_HeloStrInEnvelope: EHLO icbc.com.cn