The email also detailed an incident before the closure of the centre where lead maternity carers were ''confronted'' by centre staff and midwives.
''They felt that threatened that they left the facility and saw the women in their own homes,'' the email said.
''These are experienced, confident midwives who no longer feel safe to go into that environment.''
Two days later, Clutha Southland New Zealand First list MP Mark Patterson sent an email to executives at the SDHB and Gore Health, in which Patterson said he felt there was ''some justification'' for the concerns of the northern Southland community regarding their maternity services.
Patterson wrote that the outcomes from efforts to provide midwife cover had been ''disappointing to say the least'' and that he noted points around ''unsuccessful recruitment for Lumsden and 'toxic culture'.''
Yesterday, Walker said the culture in Lumsden had been one of fear, uncertainty and genuine concern for the safety of pregnant mothers and babies.
Carrie Williams, a director of Lumsden Maternity Centre operator the Northern Southland Health Company, said she was not aware of the issues raised in the emails.
''As long our as our facility was open, I am not aware of any allegations of a 'toxic culture' there ... I think they must be referring to the aftermath after the facility closed,'' she said.
''I have no doubt that afterwards there was a very strained relationship between midwives and the DHB.''